59
TK-5710
(
B
)
/5710H
(
B
)
ADJUSTMENT
BER (Bit Error Rate) Measurement
1. The Panel Test Mode is used to measure the BER (Refer
to "Test mode operation features" described on page 54.).
2. Select ”20” for test signaling (Refer to "Test Signaling"
described on page 55.).
When "20" is selected for the test signaling, the filter is
automatically selected to "APCO".
(If there is no RF input signal, the display shows
”500000”)
3. Select a filter (Refer to "Filter Mode" described on page
55.).
4. Select a test frequency (Refer to "Test Frequency" de-
scribed on page 55.).
C4FM (APCO) Deviation Adjustment
1. The transceiver adjusts the deviation between High Devia-
tion ±1800Hz for the C4FM (APCO).
2. The Symbol Rate Pattern is used when adjusting the High
Deviation for the C4FM (APCO) (Refer to "Test Signaling"
described on page 55.). This test signal has a peak devia-
tion equal to
π
/2 1800Hz = 2827Hz.
Adjustment Points
5. Measure the BER (Bit Error Rate) using the digital radio
tester. Enter a standard input signal into the transceiver as
a standard tone test pattern.
6. Adjust the input signal level to achieve the standard bit
error rate (BER).
(For example, if the BER is 5%, the display shows
”050000”.)
Vgc
Vg2
Vg1
CN3
+B
Vgc
8T
CN10
VR1
CN1
TX
CN2
RX
CN4
GND
+B
Vgc
Vg3
+B
REV FWD
FINAL UNIT (X45-3760-10)
: TK-5710H(B)
Component side
CN200
RX
CN150
TX
CN152
TX
L221
L222
L223
L224
L225
L226
L227
L228
L229
L230
L231
QUAD
SLO
CN202
1
2
L232
CN203
CN201
CV
UL
MB
EP
DAT
CLK
CVu
2
1
TX-RX UNIT (X57-7030-10)
Component side
CN10
CLKC
32K OUT
VR1
CN1
TX
CN7
+B
CN2
RX
FINAL UNIT (X45-3750-10)
: TK-5710(B)
Component side
CONTROL UNIT (X53-4120-10)
Component side