
2 -3 -2 rocedure :
1: Connect the counter via 0.01 tlï to T . 7 and check the frequencies of the
2nd RX oscillator in reference to the following chart:
Channei 1, 5, 9, 13, 21, 10,180 MHz ±2 0 0 Hz
2, 6, 10, 14, 22, 10,170 MHz ±20 0 Hz
3, 7, H , 15, 24, 10,160 MHz ±20 0 Hz
4, 8, 12, .16, 23, 10,140 MHz ±20 0 Hz
2. Connect the counter via 0.01 fj¥ to T . 8 and check the frequencies of the
3.
2nd TX oscillator in reference to the following chart, while transmitting:
""N.
Channei ± 1; 5, 9, 13, 17, 21л 10,635.MH z ±200 Hz
if4 2, 6, 10, 14, 18, 22;r 10,625. MHz ±200 Hz
T3, 7, 11, 15, 19, 24,7- 10,615. MHz ±200 Hz
Ü4, 8, 12, 16, 20, 23, V 10,595 MHz ±200 Hz
Connect the counter via 0.01 ,«F to T . 9 and cheçk the frequencies of the
master Xtal oscillator in refeijêfljë to the following chart:
Channei 1—4
5—8
9— 12
13— 16
17— 20
21/22, 23,
24
37,-æ©- MHz
37,650 MHz
37,700 MHz
37,750.MHz
U 37,800 MHz
- ' 37,850 MHz
± 37,800 MHz
± 800 Hz
± 8 0 0 Hz
± 800 Hz
± 800 Hz
± 800 Hz
± 800 Hz
± 800 Hz
4. Check the output voltages of ,the above oscillators with the RF-Voltmeter
at T . 7 (5V),, T . 8 (5V) and T . 9 (3V).
If necessary adjust L9 to the correct voltage and frequencies at T . 9.
5. In case the above datas are not obtainable, check the voltages on TR 8, 9,
10, T . 2, D-6 as indicated on the schematic diagram. Replace if necessary
any defective crystals and components.
2 -4 -0 RECEIVER CHECKOUT AND ALIGNMENT
2 -4-1 Testequipment required:
Very, stable signal generator 455 KHz to 27,275 MHz
Multitester 50Kohm/V
AF-Voltmeter
2 -4 -2 Checkout procedure
1. Connect the signal generator to the antenna jack and the AF-Voltmeter
across the speaker.
2. Set the channei selector to 13 and tune the signalgenerator to 27,115
MHz and set the modulation to 1 KHz/30%.
3. Set the output attenuator of the signal generator to 0.35 pN and the
Volume control for a reading of 1 Voit on the AF-Voltmeter.
4. Switch the signal generator to CW without touching thé attenuator and
take the reading from the AF-Voltmeter (0.3 Volt or less). This indicates
the Signal to Noise ratio of the receiver(S/N+N)is 0.35 fjN for 10db(S/N+N)
5. To check the overall sensitivity of the receiver, turn the volume control
to max. and switch the signai generator to 1 KHz/30% modulation and
set the attenuator to 0.35/iV. The AF-Voltmeter shall read 2V (500mw/
8 Ohm) or more.
7 —