User's Manual

3-18
Table 3-5. Transceiver Status Inquiry Commands
CODE NAME DESCRIPTION
?76 Squelch Detect
Parameters
Value is returned in the form: “w.0aaa.1bbb.2ccc .3ddd.4eee.5fff”
aaa = 30 to 90 MHz squelch level scalar
bbb = Carrier level slope scalar
ccc = Noise level slope scalar
ddd = Squelch level offset
eee = Squelch pot slope scalar
fff = Squelch threshold offset
?77 to
?79
Reserved
?80 to
?85
Deviation Values
(VP)
Returns the value in the form “Fxxx”
xxx = current value of that variable.
?86 Read PA-PATH
discrete
Return values in the from: “Dx”.
x = 0 if PA-PATH discrete low,
x = 1 if PA-PATH discrete high.
?87 Read muxed analog
values
Returns value in the form: “abbbcccdddeeefff”
bbb = CAL_DET_CTRL,
ccc = B3_CAL_DET_CTRL,
ddd = B3_LOCK_DET_CTRL,
eee = B3_TONE_DET_CTRL,
fff = LOCK_DET_CTRL.
?88 Read analog values Returns value in the form: “bxxxcccdddeeefff”
xxx = A2D_OVERTEMP,
ccc = A2D_VOL_POT,
ddd = A2D_SQL_NL,
eee = A2D_SQL_CL,
fff = A2D_SQL_POT.
?89 Aviation Mode Returns value in the form: “!”
n=0 Disable Aviation Mode
n=1 Enable Aviation Mode
?90 Receiver Filter
Bandwidth Selection
Returns value in the form: “<xxxx”
xxxx = bandwidth value for the current channel (wideband or narrowband)
?99 Debug Inquiry Returns value in the form: “?”
The string returned by this command depends on debug code provided by
the developer. If the chip was not compiled with the debug option, then this
command will return a NAK.
The following inquiry command applies to transceivers with the EBN-30 Option, 30-90 MHz Band
Enhancement.
?19 30_90 SQL Returns the status of the 150 Hz tone squelch. See ">" command in the
Transceiver Adjustment Commands. Returns ">n" where ‘n’ = 0 for
unsquelched, and ‘n’ = 1 for squelched.
3-4. INTERFACE CHARACTERISTICS
Figure 3-2 shows interface connector locations for the URC-200 (V2). The following tables list the
interface characteristics of the voltages and signals of the URC-200 (V2) power, HDST, and X-
mode connectors, respectively. Connector reference designation and connector part numbers are
given in each table title. Table 3-10 provides part identification data for each connector.
Table 3-6. Power Connector J1 (CA110821-1) Pin Characteristics
PIN
FUNCTION
1 12V Battery 1 - Negative / Transceiver Ground for External Power Source