HYT TC-268 Service Manual page 59

Adjust Description
Program TC-268/TC-368 via programmer or PC programming software, or manual adjustment. Adjust
TC-268/TC-368 in manual adjust mode as follows (refer to "software descriptions " for the manual
adjusting and model setting).
Ⅰ
. Instrument:
1. Communication analyzer
2. Frequency scanner
3. 3A/10V power supply
4. Digital Voltmeter
5. 3A DC Ammeter
Ⅱ
. Adjust:
1. Initialization：
It is necessary to initialize the transceiver because there is useless data in EEPROM. Short
circuit the SELF points on PCB, turn on the power till there comes the sound "BEEP", place the
channel selector knob at CH1[TC-268(1)] or CH2[TC-268(2)], or CH4[TC-368], press [MONI],
then press [PTT], to begin initializing the channel and other data. Please refer to the outcome of
initialization at"TC-268/TC-368 software description".
2.Adjustment:
The adjustment of TC-268/368, some are conducted in normal mode, some are in manual
program mode. Turn on the power and enter the normal mode., at the same time, press the
PTT and MONI to turn on the transceiver， enter the manual program mode 3seconds later.(refer
to"TC-268/TC-368 software description" manual program mode).
VCO SECTION:
ITEM CONDITION
1.Setting 1.power 7.5V
1.CH: TX HIGH
2.Transmit VCO
lock voltage
2.CH: TX LOW
1.CH: RX HIGH
3.Receive VCO
lock voltage
2.CH: RX LOW
Note:
if unlock VCO, check adjustment is enabled in manual mode.(signal could be transmitted regardless of
the lock of VCO in manual mode).
1 set
1 set
1 set
1 set
1 set
measurement
Test
terminal
equip
Digital
CV
Voltmeter
57
TC-268/368 Service Manual
Adjustment
part Method
3.7V±0.1V
TC1
check
TC2
3.7V±0.1V
check
Specifications
/Remarks
TC-268>0.7V
TC-368 >1V
TC-268 >0.7V
TC-368>1V