PIN #/NAME DESCRIPTION
q
DATA IN
Communication data input.
w
GND
Ground for DATA IN, DATA OUT and AF OUT.
Transmits when grounded.
e
PTTP
When grounded, microphone input (pin 6) of [MIC]
connector will be disconnected.
r
DATA OUT
Outputs 9600 bps receive data.
t
AF OUT
Outputs 1200 bps receive data.
y
SQL
Squelch output.
Goes to ground when squelch opens.
Rear panel view
DAdjusting the data speed
qSelect
M
-
3
.
wPush [F-4
9600
] to select the 9600 mode ON and
OFF.
•“”appears when the 9600 mode is activated.
DAdjusting the transmit signal output from the TNC
When setting data transmission speed to 9600 bps,
the data signal coming from the TNC is applied ex-
clusively to the internal limiter circuitry to automati-
cally maintain bandwidth.
NEVER apply data levels from the TNC of over 0.6
Vp-p, otherwise the transceiver will not be able to
maintain the band width and may possibly interfere
with other stations.
NOTE: Read the instructions supplied with your
TNC carefully before attempting packet operation
with the IC-7000.
1.When using a level meter or synchroscope, adjust
the TX audio level (DATA IN level) from the TNC as
follows.
0.4 Vp-p (0.2 Vrms): recommended level
0.2–0.5 Vp-p (0.1–0.25 Vrms): acceptable level
2.When not using a measuring device.
➀Connect the IC-7000 to a TNC.
➁Enter a test mode (“CAL”, etc.) on the TNC, then
transmit some test data.
➂When the transceiver fails to transmit test data or
transmits sporadically ([TX] indicator doesn’t light
red or blinks):
- Decrease the TNC output level until [TX] indica-
tor lights red continuously.
When transmission is not successful even though
[TX] indicator lights red continuously:
- Increase the TNC output level.
DData socket
10
11
