Atec Aeroflex-3920B - Manual (Page 7)

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P25 Phase ii Two-Slot TDMA (Time Division Multiple Access)
Physical layer (390XOPT220)
One of the newest features of the 3920B is the capability to test P25
Phase II TDMA operation of both base stations and mobile stations.
With this option, the 3920B can measure and analyze the different
modulations used for both the outbound and inbound signals used
in P25 Phase II. With the modulation for Phase II being completely
different from the Phase 1 C4FM modulation; this option is critical
for radio technicians, designers, or anyone involved with the roll-out
of P25 Phase II systems. Included with this option are the following
features:
• H-CPM (inbound modulation) modulation and demodulation
• H-CPM eye diagram, distribution plot, and constellation
• H-DQPSK (outbound modulation) modulation and
demodulation
• H-DQPSK eye diagram, distribution plot, and constellation
• Generation of all H-CPM standard patterns
• Generation of all H-DQPSK standard patterns
• UUT measurements for Phase II including modulation fidelity,
symbol deviation, symbol clock error, frequency error, power
and TX Bit Error
P25 Phase II
Off Air Monitor Software for P25 Message logging -
Protocol Analysis Tool (390XOPT230)
The Aeroflex 3920B P25 Off Air Monitor (OAM) is used to
capture and view APCO P25 messages sent over the air. The OAM
can receive and demodulate P25 RF signaling, decode P25 messa-
ges and log these messages to a file for later viewing. Both trunked
(control and traffic) and conventional channels are supported,
allowing network engineers to:
• Verify compliance to P25 standards
• Troubleshoot existing P25 systems
• Analyze third party signaling
This option is a PC application that, using the data from option
390XOPT206, performs an advanced decoded display and log of the
XML data streams from multiple P25 channels. This provides the
user with the data to perform a complete analysis of all channels of a
P25 trunked system.
P25 AES Encryption (390XOPT240)
With the addition of this option, the 3920B supports P25 encryp-
tion formats and manual key entry for systems that employ DES
OFB Type III (included in 390XOPT200) or AES encryption
(390XOPT240). These options allow decoding of encrypted voice
frames to verify encrypted channel performance. Encryption keys
may be loaded manually using either the front panel or external
keypad or with option 390XOPT209, keys may be loaded with the
Project 25 Key Fill Device (KFD) interface protocol. Additionally,
keys may be loaded using KVL ASN mode of operation found in KVL-
3000 and older model key loaders from Motorola.
X2-TDMA Test Suite (390XOPT219)
Available for testing X2-TDMA test systems, this option is available
through Motorola only.
X2-TDMA Mobile Emulator (390XOPT245)
This option enables the testing of X2-TDMA base stations. This
option is available through Motorola only.
P25 Performance Test Triggers (390XOPT260)
In order to perform the P25 Performance Tests required by the TIA
102-CAAA standard, the 3920B has the capability with this option of
generating trigger signals. This Sync I/O port on the rear panel of
the 3920B is used to source this trigger. The output trigger signal is
generated when any of the following occur.
• Switching between the STD SILENCE pattern and the STD 1011
pattern
• Switching between the STD BUSY pattern and the STD 1DLE
pattern
• Enabling the STD LDU1 pattern
• Enabling the STD LDU2 pattern
• During trunking simulation at each slot boundary
• During trunking simulation, when a Channel Grant message is
transmitted
X2-TDMA Advance Test Suite (390XOPT261)
This option combines 390XOPT216 and 390XOPT245.
MOTOROlA HPD TESTinG OPTiOn (390XOPT300)
• Generate/receive HPD signals
• Modulation - 64QAM, 16QAM and QPSK (inbound and
outbound)
• Transmitter parameters including signal power, frequency error,
EVM
• Symbol clock error, RX BER, burst timing error and occupied
bandwidth
• I & Q modulation analysis including constellation and trajectory
plots of the data symbols, synch and pilot bits
• Display of Min/Max and average as specified by the number of
bursts
• Pass/Fail indication using color code meters
Aeroflex has developed this test mode for Motorola to address the
need for testing their high performance packet data operation on
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