COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
2.3.4.2. TTL and RS422 Data I/Os
Four sets of TTL test points labelled SET #1 (connectors J1, J5, J9, J13, J17, J21), SET #2 (connectors J2, J6,
J10, J14, J18, J22), SET #3 (connectors J3, J7, J11, J15, J19, J23) and SET #4 (connectors J4, J8, J12, J16,
J20, J24) are available. SET #3 and SET #4 are also available as RS422 on a separate connector.
SET # 1 to 4 can be used for data & clock I/Os on the High bandwidth TMU, TCU and TMS units. The
assignment is factory configured, but can also be modified by the user as described in section 4.2.8.9.
Refer to Annex 5 (section 1.5) for uplink and downlink data I/Os assignment in your machine.
Refer to section 3.3.7 for more details on the usage on Downlink I/O test points.
Refer to section 3.4.1 for more details on the usage on Uplink I/O test points.
SET # 1 I in / J1
SET # 2 I in / J2
SET # 3 I in / J3
SET # 4 I in / J4
Uplink : I channel input (NRZL) to the TMS or TCU
Downlink : I channel input to the associated TMU (decoding
or F/S)
SET # 1 Q in / J5
SET # 2 Q in / J6
SET # 3 Q in / J7
SET # 4 Q in / J8
Uplink : Q channel input (NRZL) to the TMS or TCU
(for QPSK and OQPSK modulation only)
Downlink : Q channel input to the associated TMU
(decoding or F/S)
(QPSK or OQPSK demodulation only)
SET # 1 Clk in / J9
SET # 2 Clk in / J10
SET # 3 Clk in / J11
SET # 4 Clk in / J12
Uplink : clock input to the TMS or TCU, refer to paragraph
4.2.7.9 for sampling polarity
Downlink : Clock input to the associated TMU (decoding or
F/S) , refer to paragraph 4.2.7.9 Erreur ! Source du renvoi
introuvable.Erreur ! Source du renvoi introuvable. for
sampling polarity
SET # 1 I out / J13
SET # 2 I out / J14
SET # 3 I out / J15
SET # 4 I out / J16
Uplink : I channel output (NRZL) of the TMS or TCU
Downlink : Bit synchronizer or Decoder output (I channel) of
the associated TMU (see Note 1)
SET # 1 Q out / J17
SET # 2 Q out / J18
SET # 3 Q out / J19
SET # 4 Q out / J20
Uplink : Q channel output (NRZL) of the TMS or TCU
(for QPSK and OQPSK modulation only)
Downlink : Bit synchronizer output (Q channel) of the
associated TMU (QPSK or OQPSK demodulation only)
SET # 1 Clk out / J21
SET # 2 Clk out / J22
SET # 3 Clk out / J23
SET # 4 Clk out / J24
Uplink : clock output of TMS or TCU, refer to paragraph
4.2.7.9 for data update polarity
Downlink : Clock output of the associated TMU, refer to
paragraph 4.2.7.9 for data update polarity
Table 15: Interconnection Panel. TTL Data I/Os
Note 1: merged I & Q channels if parameter TP: I/Q INTERLEAVE is set to ENABLE (Refer to the MCS User’s
Manual and the TCP/IP Interface Specification (TMU Table) for more information on I/Q interleave, I/Q swap, I/Q
invert and PCM encoding on the test points).
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