Motorola M3097 Service Manual download pdf (Page 55)

Motorola Confidential Proprietary

TDMA M3090/M3097Test Procedures

44

TX ST Deviation Test

Communications Analyzer Setup:

• Select TX button from the Screen Con

trol panel

• PWR is measured in dBm

• Set Frequency Measurement to auto

or manual (display will show TX Freq.

Error)

• Set TX frequency to 834.990 MHz

• Set IF filter to 230 kHz

• Set AF Filter 1 to 50 Hz

• Set AF Filter 2 to 15 kHz

• Set AF gen1 for 1 kHz frequency at

6V level (output will go to the audio

port)

Test Mode Commands:

11333# Load synthesizer to channel

333

122# Set power level to power step

2

05# Turn on transmit carrier

14# Enable signaling tone

View FM Deviation for reading.

The ST deviation measured on the com-

munications analyzer should be

between 7.2 kHz - 8.2 kHz .

The demodulated signal on the com-

munications analyzer should have

an audio frequency of 10 kHz.

TX TEST

dB

TX Frequency

834.9900

MHZ

Tx Power

27.49

dBm

FM Deviation

7.890

KHz

10.0000

KHz

AF Freq

Tune Mode

Auto / Manual

Tune Freq

834.990000

MHz

Tx Pwr Zero

Zero

Input Port

RF In / Ant

If Filter

230 KHz

Ext TX Key

On / Off

AF Anl In

FM Demod

Filter 1

50 Hz HPF

Filter 2

15 KHz LPF

De-Emphasis

750 us / Off

Detector

Pk +- Max

AF Gen 1 Freq

1.0000

KHz

AF Gen 1 Lvl

6.00

V

To Screen

RF GEN

RF ANL

AF ANL

SCOPE

SPEC ANL

ENCODER

DECODER

RADIO INT

More

Figure 27. TX Test Screen

TX ST Deviation Test

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