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13. Alignment
TK-701:
Measurement
Adjustment
7
Specifications/
Item
Condition
.
Test
Unit
Ter
Unit
Part
Method
Remarks
equipment
minal
1. Initial
1) PLL unit:
setup
Insert PROM (M1, M2 frequency
stored).
2) CH: Any
3) Front panel:
MONI switch set to out posi-
tion. QT/SQL just opened.
4) Rear panel:
Connect power cable and micro-
phone cable.
5) CH knob should not be loose.
The VOL, QT/SQL, MONI. and
AUX knobs should not be pulled
off easily.
6) Power switch: ON
2. Common
PLL | 1) CH:
Digital
PLL
TPI
PLL
C901
| 3.5V ADJ
Verify 6.5V or less
lock voltage
Channel in the vicinity of TX
volt
in highfrequency
center frequency.
meter
channel and 1.6V or
PTT: ON
more in low fre-
quency channel.
3. TCXO fre-
1) PTT: OFF
Fre-
TX-RX
J22
PLL
C902 | RX frequency-21.4
Within + 100 Hz
quency ad-
quency
RXO
MHz adjustment
DO NOT adjust if
justment
counter
in-spec!
2) CH:
Verify RX frequency in
Check other channels storing
each channel -21.4 MHz
frequencies.
4. Transmit PLL | 1) PTT: ON
Digtal
PLL
TP4
PLL
C903
| 3.5V ADJ
Verify 6.5. orless
lock voltage
volt
in high frequency
meter
channel and 1.6V or
more in low fre-
quency channel,
5. Sensitivity
1) CH:
Oscillo-
Rear
ESP
Front
|OFF/VOL| 0.78 V/482 (noise)
Channel in the vicinity of RX
scope
panel | (J4-3.7} | panel
center frequency.
AF volt
QT/SQL: Opened
meter
2) SSG frequency: Channel 1)
TX-RX
L20
Repeat twice in this or-
Output: 1000 nV/-53 dBm
L21
der L20, L21, L23, 124,
Modulation: OFF
L23
L25,.18,L19. (Lower
L24
| the SSG level as noise
L25
level drops.)
Li8
Then lower the noise
L19
level by L30.
L30
3) SSG Output: 1000 uV/-53 dBm | Oscillo-
Rear
ESP
TX-RX
L32
Adjust L32 for maxi-
Modulation: 1 kHz/+ 3 kHz dev. | scope
panel
| (J4-3.7)
mum AF output.
Reprat twice
Distor-
tion
L29
| At minimum distortion.
SINAD 2 37dB
meter
4) SSG Output: 1 uV/-113 dBm
TX-RX
L26
Distortion:
Adjust for minimum.
5) SSG Output: 0.7 wV/-116 dBm
SINAD 2
17d8
5-7
!
:
;
j
} |
|
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