Midland 77321 Handbuch

CB Module Tuning Procedure

1. RX TUNING

1.VCO

Adjust TC 20P variable capacitor till tolerance of 10MHz reference point is within ±

100Hz.(measure at TP8 by cymometer)

Adjust T12 coil, let VCO output is 1.9V ±0.2V at 40CH.(Measure point is at TP3 by

mechanical Voltage meter)

2. TX.

Press TEST BOX AM/FM button to switch between AM and FM

2.1 AM/FM: Press PTT, adjust TC (Frequency Tolerance TUNING), so that the

output frequency is similar to desire channel such as 27.405MHZ for channel 40.

2.2 AM: adjust VR2 (AM MODULATION TUNING) to let AM MOD at 80%~85%

and MAX is not over 100%.

2.3 AM/FM: tune T6 T7 T8 and VR200(TX POWER /TX DIST TUNING) to adjust

the TX POWER and find out the distortion is minimum point. (AM AT 80% MOD,

DIST is less than 10%; FM DIST is less than 8%). After that we have to tune the TX

Power within 3.6W to 4W by adjusting VR200.

2.4 FM: Adjusting VR4 (Frequency Deviation) to let FM frequency shift between

1.7K~1.9K and Maximum is not over 2K.

3. RX TUNING

. Press TEST BOXAM/FM button to switch between AM and FM.

3.1 AM/FM:Adjust L1~L3, T1, T2 to make the best sensitivity and S/N. It should be at

12dB SINAD and the S/N is at least –109dB..

DC 12.7V

Test Box

SAMPLE

RF Communications

Spectrum Analyzer

3.2 FM : AdjustT3(SENSITIVITYAND S/N) to let the SINAD be the best..

3.3 AM/FM : Adjust VR1(AUDIO OUTPUT) to let the audio output for FM

0.1~0.32V and AM 0.12~0.16V

3.4 Adjust VR20(SQ), when INPUT is 62dBuV and OUTPUT would be 3.8V.

Testing Point is at TP1.

2.WX Tuning

Description: WX is just a 1050Hz signal warning system.

A. Frequency reference point is as TP5. It should be 10.25MHz ±60Hz.

B. The voltage at TP6 should be 1.5 to 1.75V. If not, tune L6 till get the desired value

C. Set the testing point at the output of TP4, tune T4 till getting maximum sensitivity

and minimum distortion.

D. Set the testing point at TP10 for 1050Hz signal testing. Usually, voltage at TP10

should be high (4.9V). Upon receipt 1050Hz signal, the voltage should be low (0V).

The above testing is following ETS300-135 standard for FM, EIA/TIA-382-A for AM

including ( FCC/CE and client requirement)

PREPARED BY : Mr. YK Liu APPROVED BY :

Date: 6-Apr-05

Inhaltsverzeichnis

Andere Midland Radio Handbücher

Midland

Midland ML802 Bedienungsanleitung

Midland

Midland 70-0671 Handbuch

Midland

Midland 1001LWXA Bedienungsanleitung

Midland

Midland MXT575 Bedienungsanleitung

Midland

Midland 75-509 Bedienungsanleitung

Midland

Midland Titan Series Bedienungsanleitung

Midland

Midland 77-120ESP Bedienungsanleitung

Midland

Midland X-tra Talk LXT118 Series Bedienungsanleitung

Midland

Midland M-88 Handbuch

Midland

Midland 278 Bedienungsanleitung

Midland

Midland ALAN 48 EXCEL Bedienungsanleitung

Midland

Midland 70-530 Bedienungsanleitung

Midland

Midland GXT760 series Bedienungsanleitung

Midland

Midland PRO901 Bedienungsanleitung

Midland

Midland ALAN 48 EXCEL E40 Bedienungsanleitung

Midland

Midland 75-785 Bedienungsanleitung

Midland

Midland D-200 Bedienungsanleitung

Midland

Midland ER310 Bedienungsanleitung

Midland

Midland GXT200 Bedienungsanleitung

Midland

Midland 5001z Bedienungsanleitung

Midland

Midland ALAN 199-A Bedienungsanleitung

Midland

Midland Alan 78 Plus Multi B Bedienungsanleitung

Midland

Midland 4001 Bedienungsanleitung

Midland

Midland 8001XT Bedienungsanleitung

Beliebte Radio Handbücher anderer Marken

EisSound

EisSound KBSound iSelect Bedienungsanleitung

Konig

Konig HAV-SR41 Bedienungsanleitung

Roberts

Roberts exprssion Bedienungsanleitung

VDigi

VDigi DD3.0 Bedienungsanleitung

Radio Shack

Radio Shack 21-1863 Bedienungsanleitung

Roberts

Roberts Stream 207 Bedienungsanleitung

Sony

Sony Walkman SRF-M97 Bedienungsanleitung

Stanley

Stanley FatMax FMC770 Bedienungsanleitung

auna

auna DAB-Radio 10026947 Bedienungsanleitung

SOUNDMASTER

SOUNDMASTER UR190 Bedienungsanleitung

HYT

HYT TC-320 Bedienungsanleitung

auna multimedia

auna multimedia Yellowstone 10026851 Bedienungsanleitung

B-Tech

B-Tech GMRS-V2 Bedienungsanleitung

Weierwei

Weierwei VEV-V8 Bedienungsanleitung

SOUNDMASTER

SOUNDMASTER DAB750 Bedienungsanleitung

Telefunken

Telefunken TF-1505 Bedienungsanleitung

Makita

Makita LXRM03 Bedienungsanleitung

PRESIDENT

PRESIDENT TEDDY R. Bedienungsanleitung