Test Mode - Kenwood TK-285 Service Manual

TK-285/(N)

Test Mode

Test mode operating features
This transceiver has a test mode. To enter test mode, press
[B] key and turn power on. Hold [B] key until test channel
No. and test signalling No. appears on LCD. Test mode
can be inhibited by programming. To exit test mode, switch
the power on again. The following functions are available in
test mode.
• Controls
Controls "FNC" appears
[PTT] Used when making a
transmission.
[AUX] Release FNC
[CALL] Release FNC
[CLEAR] Lamp ON/OFF
[A] FFSK 1200bps
and 2400bps.
[B] Release FNC
[C] Compander function
ON and OFF.
[D] Best shift ON and OFF. Changes signalling.
[O] to [9], Release FNC
and [#],[∗] No Func
[ENCODER] Release FNC
• LCD indicator
"SCN" Unused
" " Lights at Compander ON.
"LO" Lights at RF Power Low.
"P" Unused
"MON" Lights at moniter ON.
"SVC" Unlock
" " Lights at FFSK 2400bps.
• LED indicator
Red LED Lights during transmission. Blinks at the low
battery voltage warning.
Green LED Lights when there is a carrier.
• Sub LCD indicator
"FNC" appears at Function ON.
26
ADJUSTMENT
"FNC" not appears
Used when making
a transmission.
Unused
Monitor ON and OFF.
No Func
Sets to the Tuning
mode.
FNC ON.
RF power HIGH and
LOW.
No Func
Changes channel.
Frequency and signalling
The set has been adjusted for the frequencies shown in the
following table. When required. re-adjust them following the
adjustment procedure to obtain the frequencies you want in
actual operation.
Frequency (MHz) (K, E type)
Channel No. RX frequency
1 233.05000
2 217.05000
3 249.95000
4 227.00000
5 227.20000
6 227.40000
7 ~ 16
Frequency (MHz) (M type)
Channel No. RX frequency
1 255.05000
2 240.05000
3 269.95000
4 260.00000
5 260.20000
6 260.40000
7 ~ 16
Signalling
Signalling No. RX
1 None
2 None
3 QT 67.0Hz
4 QT 151.4Hz
5 QT 210.7Hz
6 QT 250.3Hz
7 DQT 023N
8 DQT 754I
9 None
10 None
11 None
12 None
13 None
14 FFSK(CODE)
• Preparations for tuning the transceiver
Before attempting to tune the transceiver, connect the unit
to a suitable power supply.
When ever the transmitter is turned, the unit must be
connected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
16Ω dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
TX frequency
234.10000
218.10000
249.90000
227.00000
227.20000
227.40000
TX frequency
255.10000
240.10000
269.90000
260.00000
260.20000
260.40000
TX
None
100Hz Square wave
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 250.3Hz
DQT 023N
DQT 754I
DTMF tone 9
Single Tone 1600Hz
(HSD OUT)
Single Tone 1200Hz
(MODEM OUT)
Single Tone 1800Hz
(MODEM OUT)
FFSK(PN pattern)
FFSK(CODE)