Section SDSĆ548Ć6LNĆ204
030Ć101328 Rev. A
R
0208I4RA
6
OUT level, however, can be adjusted for any level from
+7.0dBm to Ć16.0dBm TLP (Ć6.0 to Ć29.0dBm DLP). The XMT
OUT level can be adjusted by adding either gain or loss, in 0.5dB
increments, to obtain the desired transmit output level. To acĆ
cess the XMT OUT Level Adjust mode, the STC sends 1704Hz
while INTELIPORT is in the command mode. The STC can
monitor the XMT OUT port to verify the change in levels.
Ć NOTE Ć
INTELIPORT's XMT OUT Level Adjust mode provides a builtĆ
in five minute waiting period for each tone to be returned by the
STC. If no tone is sent to INTELIPORT during the five minute
time frame, INTELIPORT sends an error tone (rampĆdown
tone of 3014 Hz to 314 Hz; holding the 314 Hz tone for 10 secĆ
onds) and returned to idle. The rampĆdown tone, in this case, inĆ
dicates the XMT OUT Level Adjust mode has timed out via the
5Ćminute timeĆout feature.
3.14
Adding Gain
The STC adds gain to the XMT OUT level by sending and reĆ
moving a tone of 2222Hz. Upon detecting 2222Hz,
INTELIPORT reĆadjusts the output level by adding 0.5dB of
gain. If more gain is required, the STC repeats the process of
sending and removing 2222Hz. INTELIPORT reĆadjusts the
output level by 0.5dB each time 2222Hz is sent and removed. AfĆ
ter obtaining the required XMT OUT level, the STC must send
2713Hz for 0.9 seconds minimum to return to command mode.
3.15
Adding Loss
The STC adds loss to the XMT OUT level by sending and reĆ
moving a tone of 2111Hz. Upon detecting 2111Hz,
INTELIPORT reĆadjusts the output level by adding 0.5dB of
loss. If more loss is required, the STC repeats the process of
sending and removing 2111Hz. INTELIPORT reĆadjusts the
output level by 0.5dB each time 2111Hz is sent and removed. AfĆ
ter obtaining the required XMT OUT level, the STC must send
2713Hz for 0.9 seconds minimum to return to command mode.
3.16
Ć16dBm Level
If desired, the STC can set the XMT OUT level for Ć16dBm by
sending and removing a oneĆtime tone of 2333Hz. Upon detectĆ
ing 2333Hz, INTELIPORT reĆadjusts its output level to
Ć16.0dBm. From this point, the STC can add gain to obtain the
desired XMT OUT level (see paragraph 3.13 and 3.14 above).
After obtaining the required XMT OUT level, the STC must
send 2713Hz for 0.9 seconds minimum to return to command
mode.
3.17
Quiet Term/Transponder Operation
INTELIPORT's Quiet Term/Transponder operation allows the
STC to remotely conduct noise and tone level measurements.
The Quiet Term/Transponder test can be conducted with levels
referenced at either TLP or DLP (data level). In the TLP mode,
INTELIPORT outputs its respective tones at +5dBm (TLP) or
at the current XMT OUT level established via the XMT OUT
Level Adjust mode. In the DLP mode, INTELIPORT outputs
its respective tones at Ć8dBm (DLP) or at the current XMT OUT
level established via the XMT OUT Level Adjust mode.
To activate the TLP Quiet Term/Transponder, the STC sends
804Hz while in command mode. To activate the DLP Quiet
Term/Transponder, the STC sends 1304Hz while in command
mode. Upon detecting 804Hz or 1304Hz, INTELIPORT applies
a quiet termination over the XMT IN port and sets a 20Ćminute
timer circuit. During quiet termination, STC performs noise
measurements at the RCV OUT port.
Ć NOTE Ć
Quiet termination remains in effect for 20 minutes or until
another tone (that is, to enter the transponder mode or return
to command mode) is sent to INTELIPORT. If no tone is sent
within the 20Ćminute time frame, INTELIPORT, after 20 minĆ
utes, sends a rampĆup tone (314 Hz to 3014 Hz; holding 3014
Hz for 10 seconds), then returns to idle. The rampĆup tone indiĆ
cates the Quiet Term/Transponder mode has timed out via the
20Ćminute timeĆout feature.
3.18
FullĆRange Transponder Mode
The fullĆrange transponder mode allows the STC to perform a
detailed level verification test over a range of frequencies from
304Hz to 3204Hz. The fullĆrange transponder is accessed from
the quiet termination mode only by sending any tone from
300Hz to 3200Hz (except 2700Hz) to INTELIPORT. Upon deĆ
tecting tone from the STC, INTELIPORT responds by
returning a similar tone (at a 10Hz offĆset) for the same duration
tone is received from the STC. Tones sent by the STC should be
in increments of 100Hz. The STC should also verify/record the
level of each tone as it is returned by INTELIPORT. Each time
a new tone is sent, INTELIPORT responds to that tone. If no
tone is sent to INTELIPORT (i.e., after removing a tone), INĆ
TELIPORT reĆapplies a quiet termination and reĆsets the
20Ćminute timeĆout circuit.
