P300H
P300 Modem Installation and Operating Handbook
Page 181
ALPHABETIC FEATURE LIST
Included as standard
Feature
Letter
Description of Feature
P300
P300
P300
P300
P300
VSAT
IBS
IDR
TCM
User
Base Modem
8
8
8
8
A
Tx path: without this the modem can be Rx only
B
Rx path: without this the modem can be Tx only
P
Variable rate:
Variable
data rate if enabled (see `R`),
fixed
if not (See `Q`)
S
70MHz IF interface: IF frequencies in the range 50 - 90MHz
(provides 50-180MHz if feature `T` also)
U
100Hz IF synth steps: 2.5KHz if not enabled
V
Misc ASIC functions: Terrestrial CRC support & BER monitoring
Viterbi FEC
8
8
8
8
N *
Viterbi FEC (to IESS 308/309), rate ½, ¾, &
I
in BPSK, QPSK and OQPSK.
Sequential FEC
M *
Sequential FEC (to IESS 312) , rate ½, ¾ &
I
in BPSK, QPSK, OQPSK
INTELSAT
Reed-Solomon
8
8
8
(switches to 225, 205, 10 or 219, 201, 9 with 4/8 deep interleaving as required for IDR &
L
Reed-Solomon outer FEC (to IESS 308/310), with n, k, t = 126, 112, 7
TCM/IDR if options are available)
Wideband IF
8
8
8
T
140MHz IF interface: IF frequencies in the range 100 - 180 MHZ
(provides 50-180MHz if feature S also available)
High Data rates
8
8
8
enabled otherwise limited to rates between
Low_Rate
and
High_Rate
(see bottom of table). No
R
If data rate is
Variable
by feature `P`, then data rate range is 4.8kbps to 5.0Mbps if this feature
effect if feature `P` disables variable rate
Async ESC
8
8
8
High rate IBS/SMS ESC (with IBS/SMS feature)
G
Variable rate ESC channel for Closed Net plus ESC operation
Async ESC access to IDR 8k sync ESC channel (with IDR option).
IBS/SMS
8
8
8
E
IBS/SMS framing (to IESS 309) with low rate INTELSAT ESC (to IESS 403).
Drop/Insert
8
8
8
C
Normal T1/E1 linear order Drop/Insert, excludes `Odd values of N` such as N=7, 9 etc (see
feature D)
IDR
8
8
ADPCM ESC channels
F *
IDR operation (to IESS 308): Two audio ESC channels, Sync 8kbps ESC, Four form `C`
backward alarms.
H
Aux: IBS variable rate synchronous Aux channel, IDR 32/64kbps in place of one/both audio
J
P1348 emulation: Emulation of P1348 / P1448 cards popular in SNG applications. Includes
generation of 64kbps carrier from 2 x 32k ADPCM audio (using IDR Audio ESC ports), or
128kbps from 2 x Audio + 64kbps data.
PRBS Tester
8
8
K
PRBS tester: Internal BERT (can run through Main, ESC and Aux channels in any o/h modes)
8PSK/TCM
8
O
8PSK with
E
rate Trellis Code Modulation (TCM, to IESS 310).
Extended D/I
8
N` giving N=1 to 31 with IBS/SMS or Closed Net plus ESC operation. E1 CAS & T1 RBS
D
Arbitrary Timeslot re-ordering on Tx & Rx paths. Timeslot ID maintenance for the `Odd values of
signalling support. Rx Partial Insert (for multi-destinational working)
Custom
I
Arbitrary `n` & `k` when using Reed-Solomon, Custom and Minimum Overhead framing modes,
Features
Custom allocation of IBS o/h between Async ESC & Sync Aux ports.
8
Dual Rate
when choice of
Low_Rate
or
High_Rate
is available (see below). No effect if feature `P`
Q
Dual rate: If data rate is
fixed
by feature `P`, then fixed at
Low_Rate
unless this feature enabled
enables Variable rate
Turbo Codec
W *
Turbo Codec inc rates ½, ¾,
I
& 0.789.
Later model P300 only (previously letter `W` was spare = active).
Spare
8
8
8
8
X
Spare (active)
Spare
Y
Spare (inactive)
AUPC
Z
Auto Uplink Power Control (requires Async ESC feature also to function)
Low_Rate
4.8k
4.8k
See features `Q` and `R` above
High_Rate
512k
512k
See features `Q` and `R` above
Monitor / AGC
*
Demod Rx carrier signal level monitor. 0-10V Analog output of carrier signal level, Eb/No, or Rx
offset frequency (in addition to normal AGC output). Constellation monitor port
1544kbps G.703
*
1544kbps G.703 interface
in addition
to RS422 / V.35 / RS232 interface (software selectable).
2048kbps G.703
*
2048kbps G.703 interface
in addition
to RS422 / V.35 / RS232 interface (software selectable).
A * in the `Letter` column indicates these features require additional hardware to be fitted (eg small PCB
or `Chip`). All Other features may be added simply by entering a `Feature Code`.