dewg cap 5/23/00 nat npx138n vhf-fm radio part i briefing on general use and settings ver. 1.0 1

DEWG CAP

5/23/00

NAT NPX138N VHF-FM RadioPart IBriefing on General Use and Settings

NAT NPX138N VHF-FM RadioPart IBriefing on General Use and Settings

Ver. 1.0Ver. 1.0 1

How to Navigate this course

In order to allow you to get the most out of these aids, you’ll be afforded the ability to move forward at your own pace. You’ll know it’s your turn to go forward in the presentation when you see this button

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This presentation has animation sequences to help demonstrate the way some things work

Press any key once you see this. The space-bar works great as an “any key”. If you want to replay animation, use the Page Up key on your PC, and press any key to restart that part

Go ahead and try this on your own:Page Up

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This presentation has animation sequences to help demonstrate the way some things work

How to Navigate this course

2

This is the NPX-138 radio from Northern Airborne Technology, Ltd of Canada which has been

designated as CAP’s aircraft VHF-FM radio of choice.

• FAA accepted for aircraft use

• 100 channels within the 138-174 mHz VHF spectrum

• “Guard” (priority) channel monitor capability

• Programmable from laptop computer in the field[Page Up

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Introduction

Otherwise, you may go to the Channel Display by lightly toggling the BRIGHTNESS switch, also labeled “NEXT”, either direction.

“HELP”

…if you want to search the built-in tutorials, you can press the white button marked “help” at this time.

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“NEXT”

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Introduction

The position of the EDIT switch governs the way in which the other switches operate. This is a pull-type lockout toggle switchDON’T move this until you cover Part II, Advanced Training on field program options and scanning

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Display, Channel, and Brightness.Display, Channel, and Brightness.

The EDIT switch centered, the function of the other chief toggle switches are as labeled above them:

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Some of the more obvious controls are right here:

• Main Volume - Adjusts receiver volume

• Display Type - Changes display mode




Introduction

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• Channel Select - Choose the channel you want

• Brightness - Adjust the screen brightness





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Introduction

• Scan Select - allows scanning or no scanning

• Guard Channel Volume and Guard Select - allow use of second receiver circuit on a Guard frequency

• Scan Select - allows scanning or no scanning

• Guard Channel Volume and Guard Select - allow use of second receiver circuit on a Guard frequency

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Let’s cover these functions in greater detail

Introduction

There are two possible screen readout types to observe, and you may use which ever you prefer:

This “Alpha-Numeric” readout……….

Operating the Radio

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……....Or this “Frequency” readout.

Operating the Radio

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The DISPLAY switch lets you choose the display mode.

• Display Switch to the left shows the ID Display

Operating the Radio

• Switch to the center is the Receive Display. This is the actual receive frequency for this “channel”

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Operating the Radio

• Switch to the right is the Transmit Display. The TX and RX frequency will most often be the same in airborne communications

Exceptions will arise.Exceptions will arise.

• See the number to the right of the RF frequency. This is the subaudiable tone, or CTCSS tone which is programmed for that channel

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• You recall from ROA training that a “channel” is comprised of 1) a radio frequency, and 2) a subaudible note, or tone, which rides underneath the voice audio and opens up other radios’ receivers

• The tone for this channel is 100 cycles, or Hertz Page Up

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In the interest of safety and confusion avoidance, it’s recommended that the radio is left in……

…this ID Display condition

…this ID Display condition

This is your preferred, typical view screen.

…this ID Display condition This screen shows everything one really needs to know while in the air:

• The Channel, as known on our other VHF-FM radios

• The normal use or tasking for that channelPage Up

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Operating the Radio

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Getting StartedOperating the Radio

• Power display - HI = 10 Watts, LO = 1 Watt• HI Power would be the normal setting

• CTCSS Tone On or Off• “ON” would be the normal setting Page Up

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Operating the Radio

• Notice that we didn’t specify the means for changing the variables such as tone, power, etc

• Once this radio is installed and programmed, it should just power up and operate “as is”

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Operating the Radio

• Part II, the Advanced User segment of this training series will cover the specifics of changing the options for tone, power, and other matters• These functions need not be altered in any way, as long as the display reads as just specified

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Here’s an overview of the other chief functions:• On/Off and Volume - Traditional function and purpose• Squelch - Push in to hear the weakest of signals• Channel - Pick the channel of operation desired

• On/Off and Volume - Traditional function and purpose• Squelch - Push in to hear the weakest of signals• Channel - Pick the channel of operation desired

Operating the Radio

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• If one considers just this much, the NPX-138N works just like any other VHF-FM radio

• Turn on, set channel, adjust volume as required

• Set display mode and screen brightness

• Set aircraft comm panel as necessary

Operating the Radio

• Turn on, set channel, adjust volume as required• Turn on, set channel, adjust volume as required• Turn on, set channel, adjust volume as required

• Set display mode and screen brightness • Set display mode and screen brightness

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• If one considers just this much of the radios operation, it works just like any other VHF-FM radio

Operating the Radio

• Leave the scan select on NORMAL, or centered• Leave the scan select on NORMAL, or centered

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• Press in the Squelch button to hear very weak signals


Operating the Radio

• Leave the scan select on NORMAL, or centered


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Operating the Radio

• Leave the scan select on NORMAL, or centered

• Change channels as required during mission• Change channels as required Page Up

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Operating the Radio

• Set the Guard Volume Control counterclockwise to it’s lowest setting for now

• Set the Guard Volume Control counterclockwise to it’s lowest setting for now

• Switch the Guard Channel Select to channel 1 or 2 depending upon the needs of your local Command

• Switch the Guard Channel Select to channel 1 or 2 depending upon the needs of your local Command

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“So, just what is this ‘Guard Channel’ feature, anyway?”

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Imagine your radio is actually -- 2 radios in one!

• You could work one channel while listening to another• You could go “off frequency” with a ground team, and

still catch a call on your primary channel from Mission Base (or from another air crew or ground team)

• You could be doing work with another agency on their channel, and still receive a CAP mission alert

• You could answer these calls without switching the dial

Here’s how to use the Guard feature:• National F-1 and F-4 are default programmed as GD1& GD2

• Use the Guard Select switch to choose which guard channel to monitor - the repeater or the air-ground frequency• Leave the SCAN switch in NORMal mode for now

• Set the Guard Volume to a desired level Page Up

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• Use the Guard Select switch to choose which guard channel to monitor - the repeater or the air-ground frequency

• Use the Guard Select switch to choose which guard channel to monitor - the repeater or the air-ground frequency

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• Choose your other operating channel with the CHANnel switch, in the common fashion for channel selection

• If you hear a call and the lamp immediately to the right of the regular on-off-volume knob lights up, then that was on the regular channel as indicated on your display• Answer that call in the regular fashion, you don’t have to change or move anything on the radio to do so Page Up

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• If you hear a call and the lamp just to the right of the Guard Channel (GD) knob lights up -

• If you hear a call and the lamp just to the right of the Guard Channel (GD) knob lights up - then you would:

• Adjust the GD Volume if necessary for good audio

• Change the SCAN/NORM switch to the bottom setting, which is labeled “GD TX” - Guard Transmit

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• All transmissions from you will now go out over the Guard Channel you selected with the switch GD1/GD2

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• Once all Guard Channel traffic is cleared, you would -

• Revert back to normal operation by switching the SCAN/NORM switch back up to where it was before

• Continue normal operations

• Adjust Main and Guard volumes, as necessary

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• It should be pointed out that Guard Channel/Regular

Channel co-monitoring is no different than the way we use the aircraft aviation band comm radios… You can hear traffic on either one, but they both have their own volume and TX controls

• Simply set the NPX-138N’s two volume knobs as needed &

answer either “radio” by means of the NORM - GD TX switch

• Guard Volume has a preset minimum volume level• Guard Volume has a preset minimum volume level Page Up

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NEXT for Answer

Operating the Radio

… And that’s it !!So, Let’s review just once more on the important stuff:

Final Practical Review

Toggle the switch labeled “BRIGHTNESS”/”NEXT”

• We know we need to see a channel display of one kind or the other, so we can use the radio.

- You see this “HELP” screen, so you would do what in order to get past this screen and on to business? Page Up

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NEXT for Answer


Toggle the switch labeled “DISP”, for “Display”

- You can display the Channel by Frequency or by it’s “name” or common usage. Choose this how?

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NEXT for Answer


Use the Guard switch, choose GD 2 for CAP-4, & you’ll hear calls on either frequency

• We’re asked to go off to another channel to assist an outside agency on a mission or work a ground team

• How do we keep an ear out for Mission Base as well?

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NEXT for Answer


This switch all the way down, and speak to them

• ….and so you’re on your agency assist and you hear a call from another CAP airplane on GD 2, which you know is CAP’s Channel 4

• What’s the fastest, easiest way to answer them?Page Up

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This is for timing

Final Practical ReviewConclusion

That’s it!• Now that you’ve seen this, the radio owners manual should be reviewed -- while you’re sitting in front of the radio if possible

• There’s absolutely no substitute for hands-on field experience

• Try these basic steps while you’re on the ground, so that they become second-nature when you’re in the air

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This is the end of the Introductory Level Briefing on the basic useof the NPX138N from NAT, Ltd

Continue with the Advanced User

Briefing to learn to use Scanning,

Priority, and Direct Frequency or Channel

Editing

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DEWG CAP9/30/00

DEWG CAP9/30/00

NAT NPX138N VHF-FM Radio

Part II

NAT NPX138N VHF-FM Radio

Part II

Advanced User Training on the use of Scanning, Priority, and Direct Frequency / Channel Editing

Advanced User Training on the use of Scanning, Priority, and Direct Frequency / Channel Editing

DAFB Air Mobility Command Museum Dover, Delaware 32

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This is the Advanced Training for use of the NPX-138 from Northern Airborne Technology

• It is assumed for the purposes of this advanced training that the operator/student has at least some experience with frequency agile radios

• Examples of such are aviation band comm radios or certain VHF-FM applications

Remember, this means you may press any key to continue

• Specific assumptions are made that the student understands the purpose of certain VHF-FM specific matters [such as CTCSS tones], and is comfortable with prior instruction on general use as covered under Part I of this user training series

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Proceed further if you desire information on Channel Scanning, Priority Scanning, and in-the-field

frequency entry.Do so only if you feel entirely confident with the preceding

material under Part I, the Basic NPX-138N User Training.

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Many radios will arrive with the default screen shown here. Your radio can be re-programmed to come on and go directly to the channel position of your choice.

For now, let’s assume this is what you see….[Page Up]

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Review

One makes display selections by means of 4 toggle switches.

Most references to adjustments will be with respect to one or more of these switches.

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“NEXT”

• IF your radio does power up with this screen, simply move the “NEXT” {Brightness} toggle to the left or right

Review

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• We now see the normal operating screen

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• The EDIT switch is normally centered so that important settings don’t get messed up

• You can, however, make corrections to TONE, POWER, SIMPLEX/DUPLEX, SCAN & PRIORITY choices by this means

XX• You can, however, make corrections to TONE,

POWER, SIMPLEX/DUPLEX, SCAN & PRIORITY choices by this means





X

Review

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“And how, exactly, do I do that?”, you ask.

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• The important mode selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

• The important mode selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

Setting Options

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• The important selections are STEPPED through, one at a time, by moving the EDIT switch to the right -- to the STep position

• The EDIT switch in this position changes the mode of these other two switches to NEXT and SELECT, as labeled below them




Setting Options

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• Toggling the switch labeled NEXT takes you through the different modes or settings which can be adjusted, such as Power, Tones, Scan, etc

• These settings are “global” - They affect all channels, not just the one displayed at the time

Setting Options

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• The SELECT toggle makes the desired change, such as (selection) On, (selection) Off, or setting High or Low, etc

• The key is knowing what it is you want or need

Setting Options

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• So we know now that we can change various parameters by running thru them one at a time with the NEXT switch

Setting Options

• So we know now that we can change various parameters by running thru them one at a time with the NEXT switch

“NEXT”“NEXT”“SELECT”“SELECT”

• And we know we can execute the change by toggling the SELECT switch.

• And we know we can execute the change by toggling the SELECT switch.

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• The first variable which comes up is the Simplex/Duplex selection

• One usually thinks of Simplex operation as direct, radio-to-radio contact, while Duplex is most often associated with repeater use

Setting Options

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• The Transmit mode should be left in DUPLEX, so that repeater channels will work. Duplex channels use one frequency for transmit and another for receive [Page Up]

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• Channels meant to be “Simplex” , such as 1 thru 4, have been programmed with TX and RX the same so they will act as simplex channels just fine [Page Up]

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• The next variable in this sequence is the POWER OUTPUT with a choice of HI, which is 10 Watts of power (max allowed in CAP air service), or LO, which is 1 Watt

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• The TONES selection is the next variable

• You recall from ROA training that a “channel” is comprised of 1) a radio frequency, and, 2) a sub-audible note, or tone, which rides underneath the voice audio and opens up other radios’ receivers

• The choices for the TONES setting are: ON, OFF, or TX ONLY. Leave “ON” for most general use

Setting Options

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• IF you need to hear a channel without your receiver tone filter on, “TX ONLY” does this. Don’t ever set to “TONES=OFF”. This cuts TX tones as well & you’ll forget, leaving it unusable for future air crews. 44

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Setting Options

• The next changeable option is the TONE DISPlay.

• In order to explain it’s significance, take a look at the main screen again, in this DISPlay mode

• Assume you’re now in the RX Display mode[Page Up]

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• The TONE DISPlay mode determines how that tone is labeled, for programming or reference purposes

• Choices are the audio frequency itself, such as 100.0, or the EIA# such as “12”, or other nomenclatures used by the Motorola or Wulfsberg companies [Page Up]

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Setting Options

• We refer to tone types in both simplex and repeater service by their frequency - 156.7 Hz, 203.5 Hz, etc

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• This will become important if you should need to install other users’ channels in the field

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• So, “TONE DISPlay” is simply a choice of ways to refer to the CTCSS tones you may need to enter in the field

• Let’s go back to the STep SELECTion we just left, showing the TONE DISP option and continue from there…...

Setting Options

• The next selectable options are the SCAN bank designator and the PRIORITY selector

• These two functions and their set-up are related, so we’ll cover them together in just a moment

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• Another selection along in the Step process lets you choose the channel you see when you POWER-UP the radio

Setting Options

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Once all of the STepped variables have been set, return the EDIT switch to the center position.

Setting Options

[Page Up]

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Consider leaving all settings as show above:

DISPlay Switch = ID

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SCAN Switch = Normal

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Guard1/Guard2 = G1

or as directed by local command[Page Up]

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Channel = Air to Ground

or as directed by your local command

[Page Up]

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Verify that you left :

POWER = HI

[Page Up]

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TONES = ON

[Page Up]

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EDIT Switch = <Centered>

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• We didn’t go through all selections possible within each variable option category

• Most people won’t need to change any of these aforementioned selections, but it’s good to know how to do so in the field or on a mission

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Advanced User Training

OK, let’s cover Channel Scan and Priority

• Scanning is the process of allowing the radio to listen to many channels in a repeating sequence

• The receiver stops on a channel if it’s in use, so you can hear if there’s traffic of interest to you

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SC

• The display, in ID DISPlay mode, will show “SC“ to the right of the Channel Name if it’s on the Scan List

[Page Up]

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• If you choose to use the SCAN feature, first put your radio on the primary Channel you’re going to be working

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• Then, move the SCAN/NORM switch upwards and the radio will begin scanning channels [Page Up]

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• If the “home channel” becomes busy, the receiver will revert back there for you

SC

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• If a channel becomes a nuisance, toggle the CHANnel switch to “ - ” to make the radio ignore that channel

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• This temporary bypass request is reset once you leave the SCAN mode, or if you power off the radio [Page Up]

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• In addition to being on the normal Scan list , certain channels can be designated as Priority channels

SC PI

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• You’ll see a PI or P2 to the right of the Channel Name if

this channel was programmed as a Priority channel

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• If a Priority channel becomes active while you’re scanning, the radio will go to the priority channel [Page Up]

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SC PI

• This is NOT the same as a guard channel. A scanned channel is monitored in sequence; A Guard channel is monitored simultaneously regardless of other activities

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• A channel is made a Priority channel at the time of programming; This can be changed in the field by persons who know how to edit or enter channels in the field [Page Up]

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• We now know that there is a batch of channels listed in a main Scan group, and that there are certain ones among this group which are Priority selections

• How do we decide if we want to simply scan those in the Scan group batch, or if we want to be interrupted by Priority channels as well?


1122

SC PI

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1. Move the EDIT/STep switch to the right

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2. Use the NEXT toggle to find the SCAN options

(Note that at present, only the normal scan list is chosen)

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3. SELECT whether to scan just the LIST of scan-channels, or if you want the scan-LIST and the PRIority feature to be engaged

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“NEXT”“NEXT”

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• The use of scanning is a subject best covered in detail under self-study in front of the radio with the manual

SC PI SC PI SC PI SC PI SC PI

• Please avail yourself of this time-honored training technique

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BREAKBREAKPlease take a 15 Minute recess before

continuing with this program

Please load the file NPX138 2of2 Advanced Training.ppt for the rest of this training session.






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Part 3

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Now for the interesting part:

“Field Programming”

SC PI

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OK, you asked for it• The truth is that once you practice this procedure on an empty channel, you’ll find it follows very predictable steps from operation to operation

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You need to know these things to enter a channel:


• Whether this is to be included in the Scan List

SC PI

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• Whether this is a Narrow or Wide Band FM channel

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• A name for this channel up to 10 characters long

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• The TX & RX frequencies and subaudable tone

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• Is this channel already programmed in this radio? [Page Up]

or NEXT

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Let’s first dial up the radio frequency • Move the EDIT switch to the LEFT this time• We’ll call this the EDIT CHannel selection• We’ll call this the EDIT CHannel selection

[Page Up]

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• The DISPlay switch now shows what it is that you’re changing - The name display, transmit frequency, receive frequency, etc [Page Up]

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• We’ll start with the DISPlay switch in the <center>

r

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• We learned that the DISPlay switch in the (RX) position shows the Receive frequency

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• It’s the same with programming: You’re programming whatever the DISPlay is set to show at the time

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RX

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• Being as the DISPlay now shows the RX display, we’ll begin programming the Receive frequency

r

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• The NEXT switch chooses the digit to be edited

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• The SELECT switch makes the number change[Page Up]

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• After each digit is SELECTed, go to the NEXT one and keep going until the whole frequency is entered

r

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• Then, go NEXT even further over to the right, and enter the CTCSS tone as needed.

[Page Up]

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• That’s it for the Receive frequency[Page Up]

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• Now that we have an RX frequency, we’ll do the exact same thing for the Transmit side of the formula

rt

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• Change the DISPlay switch to the right, to the TX setting

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• Duplicate the frequency and tone which was put into the RX side (unless the circumstance directs otherwise)

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The next step is to assign the Identification, Channel Bandwidth and Scan List inclusion The next step is to assign the Identification, Channel Bandwidth and Scan List inclusion The next step is to assign the Identification, Channel Bandwidth and Scan List inclusion The next step is to assign the Identification, Channel Bandwidth and Scan List inclusion

SC

[Page Up]

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• This step changes items seen in the ID screen, so we need to switch the DISPlay to ID to make these changes

[Page Up]

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• Again, use the NEXT switch to choose which space to edit, and then SELECT the letter, numeral, symbol needed

• Again, use the NEXT switch to choose which space to edit, and then SELECT the letter, numeral, symbol needed

• Again, use the NEXT switch to choose which space to edit, and then SELECT the letter, numeral, symbol needed [Page Up]

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• For the time being, we’ll assume all field entries will be in Wide Band format, as used by our other radios at present

• The next choice is for Wide or Narrow FM channel width

W SC

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• Select whether this channel is to be put on the Scan List for later use in channel scanning

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W SC

• Finally, return the EDIT switch to the center position

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• Finally, return the EDIT switch to the center position

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Take a moment to go through this informal check-list just once more, to ensure that the equipment is ready for action…..

Setting Options

w SC

Mission-Ready Check List

[Page Up]

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DISPlay Switch = ID

[Page Up]

or NEXT

Channel = Air to Ground

or as directed by your local command[Page Up]

or NEXT

SCAN Switch = Normal

(Not Scanning At This Time)

[Page Up]

or NEXT

Guard1/Guard2 Switch = G2

or as directed by local command[Page Up]

or NEXT

Verify that you left :

POWER = HI

[Page Up]

or NEXTrt

TONES = ON

[Page Up]

or NEXTrt

EDIT Switch = <Centered>

[Page Up]

or NEXTrt70


…and now for some practical review of setings….

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Press Here for Answer


You’re not transmitting CTCSS tone on your radio; Check and correct this no-tone-xmit condition

• Your ground team calls and urgently tells you they can only hear you when they use their “Monitor” button

• Why?

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or NEXT

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Pull, then move to the right, the EDIT/STep switch

• “How do I do that?” you ask.

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or NEXT73


Pull, then move to the right, the EDIT/STep switch

Use the NEXT switch to toggle around until you find the selection for TONE control options

• “How do I do that?” you ask.

“ NEXT”“ NEXT”

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Use the SELECT switch to turn the TONES ON

“ SELECT”“ SELECT”

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Return the EDIT/STep switch to the Center

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Return the EDIT/STep switch to the Center


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w

SC


• Name the things you need to know before you program a radio channel into this unit

- The Transmit and Receive Frequency

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- The Subaudiable tone (CTCSS) required

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or NEXT

- Is this channel already programmed in this radio?Page Up

or NEXT

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• What else would it help to know about this channel?

- A name for this channel up to 10 characters long

Page Up

or NEXT

SC

- Whether this is to be included in the Scan List

[Page Up

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- Whether this is a Narrow or Wide Band FM channelPage Up

or NEXT

w

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Conclusion

It is hoped that this Advanced User Training will assist you in the safe and confident operation of airborne missions using this piece of equipment

SCw

This concludes Part II, Advanced User Training on the use of the NPX138N VHF-FM Radio

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81

Questions

Always Think Safety!

dewg cap 5/23/00 nat npx138n vhf-fm radio part i briefing on general use and settings ver. 1.0 1

Documents

channel display

channel page

radio page

display switch

screen brightness channel

radio switch

guard frequency page

scanning guard channel