Section SDSĆ548Ć6LNĆ204
030Ć101328 Rev. A
R
0208I4RA
5
3.7
Remote (Manual) Alignment
While in command mode (1014Hz present), the STC should
verify/record the level received. The STC then initiates manual
alignment by sending 1004Hz to INTELIPORT. Upon detecting
1004Hz, INTELIPORT returns 2814Hz. The STC should verify/
record the level received at 2814Hz, then sends 2804Hz to
INTELIPORT. Upon detecting 2804Hz, INTELIPORT returns
414Hz. The STC should verify/record the level received at
414Hz, then sends 404Hz. Upon detecting 404Hz, INTELIĆ
PORT returns 1814Hz for 120 seconds. The STC should
verify/record the level received at 1814Hz, then has the option
of aligning the circuit to 3 tones or 4 tones.
Ć NOTE Ć
INTELIPORT provides a builtĆin five minute waiting period for
each tone (1004, 2804, and 404Hz) to be returned by the STC.
If no tone is sent to INTELIPORT during the 5Ćmin time frame,
INTELIPORT sends an error tone (rampĆdown tone of 3014Hz
to 314Hz; holding the 314Hz tone for 10 seconds) and returns to
idle. The rampĆdown tone, in this case, indicates the remote
alignment mode has timed out via the 5Ćmin timeĆout feature.
3.8
3ĆTone Alignment
If a 3Ćtone alignment is required, the STC ignores the 1814Hz
tone from INTELIPORT. After 120 seconds, the 1814Hz tone
times out, INTELIPORT sets the alignment levels, sends a eiĆ
ther a rampĆup or rampĆdown tone (see paragraph 3.10), applies
a quiet termination for approximately one second, then enters
loopback (see paragraph 3.11). NOTE: The 120Ćsecond timer
can be bypassed by sending 1004Hz to INTELIPORT during the
120Ćsecond time frame.
3.9
4ĆTone Alignment
If a 4Ćtone alignment is required, the STC sends 1804Hz within
the 120Ćsecond time frame to INTELIPORT. Upon detecting
1804Hz, INTELIPORT aligns to four tones, sends either a
rampĆup or rampĆdown tone (see paragraph 3.10), applies a
quiet termination for approximately one second, then enters
loopback (see paragraph 3.11).
Upon completing the alignment, INTELIPORT automatically
outputs a level of +5 dBm (TLP) immediately following the
alignment process. If a level other than +5 dBm (TLP) is reĆ
quired, see paragraphs 3.13 thru 3.16 for details on adjusting the
XMT OUT level.
3.10
RampĆUp/RampĆDown Tone
The rampĆup tone, consisting of a series of tones ranging from
314Hz to 3014Hz in ascending order, indicates alignment is
within the requirements of C5 conditioning. The rampĆup tone
also occurs whenever a 20Ćminute timer circuit times out due to
inactivity (that is, no tone sent to INTELIPORT during a test
function equipped with the 20Ćminute timeĆout feature). The
rampĆdown tone, consisting of a series of tones ranging from
3014Hz to 314Hz in descending order, indicates alignment is not
within the requirements of C5 conditioning. The rampĆdown
tone also occurs whenever a 5Ćminute timer circuit times out due
to inactivity (that is, no tone sent to INTELIPORT during a test
function equipped with the 5Ćminute timeĆout feature).
The rampĆup or rampĆdown tone sequence is applied for
approximately three seconds with the last tone (3014Hz in the
rampĆup sequence or 314Hz in the rampĆdown sequence) being
applied for approximately 10 seconds.
3.11
Loopback
Loopback permits verification of alignment settings. While in
loopback, the STC sends tones (404, 1004, 1804 and 2804Hz),
one at a time, to INTELIPORT. The STC should verify/record
the level of each tone as it is looped back by INTELIPORT. The
loopback circuit automatically inserts 16dB of gain to provide an
equalĆlevel loopback condition for verifying alignment settings.
Ć NOTE Ć
Loopback can be toneĆactivated from the idle state by sending
2713 Hz for more than two seconds but less than 30 seconds.
Loopback can also be activated manually by placing a ground
on the MNLB lead, pin 1.
3.12
Loopback Release
Loopback is equipped with a 20Ćminute timeĆout feature that
automatically releases the loopback condition 20 minutes after
initial activation.
When loopback is entered after the alignment mode and if reĆ
lease from loopback is desired before the 20Ćminute time frame,
the STC can send 2713Hz for 0.9 seconds, minimum. INTELIĆ
PORT returns to command mode. At this point, if the STC
removes and resends a second 2713Hz tone, INTELIPORT reĆ
turns to idle.
When loopback is entered from an idle state, release from loopĆ
back is accomplished by sending 2713Hz for 0.9 seconds,
minimum. INTELIPORT returns to idle upon detecting
2713Hz.
Ć NOTE Ć
When loopback is manually activated, neither automatic time
out nor detection of 2713 Hz will effect loopback release. Release
of a manuallyĆactivated, neither automatic time out nor detecĆ
tion of 2713 Hz will effect loopback release. Release of a manualĆ
lyĆactivated loopback condition can only occur by removing the
ground.
3.13
XMT OUT Level Adjust Mode
INTELIPORT's operating levels are factory set for Ć3.0 dBm at
the RCV OUT port, +13.0 dBm at the XMT IN port, and
+5.0dBm at the XMT OUT port (refer to Table 1). The XMT
