Atec Anritsu-MG3670 Series User Manual
Page 10
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299
RADIO COMMUNICATIONS, EMI MEASURING TEST INSTRUMENTS
6
•
MG0314A W-CDMA Modulation Unit (incorporated in the MG3672A)
≤0 dBm output, CH1 only on, level control program function Off
Modulation accuracy (VEM),
VEM
≤2.5%rms, ρ ≤0.9992 (With SPEC 1 baseband filter)
Waveform quality (
ρ)
VEM
≤3.5%rms, ρ ≤0.999 (With SPEC 2 baseband filter)
VEM
≤9.7%rms, ρ ≤0.99 (With SPEC 3 baseband filter)
VEM
≤3.0%rms (With Nyquist/Root Nyquist baseband filter)
0 dBm output, 30 kHz bandwidth (Forward link/Reverse link, Default)
Spurious emissions
Level control program function
Variable level in 1 dB steps from RF output level to 0 to –20 dB range in 1.25 ms units (program interval: 800 ms)
Control signal I/O
Long code trigger input, ESTM output, ESTM alignment output, data output, data clock output, frame clock output, time
reference clock output, TTL level, BNC connector (rear panel)
Auxiliary signal outputs*
2
Long code, short code I/Q: TTL level, BNC connector (rear panel)
Long code trigger, 26.7 ms clock, 80 ms clock,TTL level, D-sub connector (rear panel)
Offset frequency
≥750 kHz
≥900 kHz
≥1.98 MHz
Baseband filter
SPEC 1 + EQ/SPEC 1
≤–55 dBc
≤–60 dBc
SPEC 2 + EQ/SPEC 2
≤–45 dBc
≤–60 dBc
≤–70 dBc
SPEC 3 + EQ/SPEC 3
≤–65 dBc
≤–75 dBc
*
1: This expansion unit cannot be mounted in the MG3670A mainframe.
*
2: MG3670B/3671A can mount MG0310A fitted with Option 25, but in this case the auxiliary signal output function is not available.
MG0312A QPSK Modulation Unit (incorporated in the MG3670B/C, MG3671A/B and MG3672A)*
1
Carrier frequency range
10 to 2250 MHz (MG3670B/C), 10 to 2750 MHz (MG3671A/B and MG3672A)
RF output level
–143 to +8 dBm, 0.1 dB steps
Continuously variable level range
Variable in steps of 0.1 dB in a range of 12 dB (+8 to –4 dB) from any RF output level to the upper or lower limit level.
Modulation system
QPSK, OQPSK
Bit rate
0.5, 0.512, 1.0, 1.024, 1.5, 2.0, 2.048, 2.4576 Mbps
FIR filter*
2
: FIR 1, FIR 2, FIR 3 (at a bit rate of 2.4576 Mbps)
Baseband filters
Root Nyquist:
α = 0.3, 0.4, 0.5 (operable at all bit rates)
Nyquist:
α = 0.2, 0.3, 0.4, 0.5 (operable at all bit rates)
≤1.8%rms (bit rate: ≤1.5 Mbps), ≤3%rms (bit rate: ≥2 Mbps, Nyquist/Root Nyquist filters),
Vector error (RF output)
≤2.2%rms*
3
(bit rate: 2.4576 Mbps, FIR 1 filter),
≤3%rms*
3
(bit rate: 2.4576 Mbps, FIR 2 filter),
≤10%rms*
3
(bit rate: 2.4576 Mbps, FIR 3 filter)
*
At
≤0 dBm output
Pseudo-random patterns: PN7, PN9, PN15, PN23
Internal modulation data
Fixed pattern: Iteration of any 16-bit data (Example: 2D2D
H
)
DATA CLOCK: ±5% of the bit rate
External modulation data
DATA: Digital data synchronized with the data clock
SYMBOL CLOCK: Symbol definition clock synchronized with the data clock (BNC connector, TTL level, polarity selectable)
I/Q signal output
Selectable between 50
Ω or CMOS (600 Ω), BNC connector
Phase encoding function
The phase mapping of data on a constellation can be set.
At 2.4576 Mbps bit rate, 0 dBm output level, 30 kHz bandwidth
Spurious emissions
Offset frequency
≥900 kHz
≥1.98 MHz
Baseband filter
FIR 1
≤–55 dBc
≤–60 dBc
FIR 2, Nyquist
α = 0.2
≤–55 dBc
≤–70 dBc
FIR 3
≤–60 dBc
≤–75 dBc
*
1: This expansion unit cannot be mounted in the MG3670A mainframe.
Please consult your sales representative regarding the addition of expansion units to previously purchased MG3670A-11 mainframes.
*
2: Finite Impulse Response filter conforming to the TIA/EIA/IS-95 specifications
*
3: The waveform quality
ρ conforming to the TIA/EIA/IS-95 specifications is ≥0.9995 (FIR 1), ≥0.999 (FIR 2), ≥0.99 (FIR 3).
Communication system
W-CDMA (conforms to W-CDMA system experimental specification)
Modulation
DS + QPSK
Multiplex system
CDMA
Carrier frequency range
10 to 2750 MHz
Range:
–143 to +5 dBm (number of multiplex channel: 1), –143 to +1 dBm (number of multiplex channels:
≤8),
–143 to –2 dBm (number of multiplex channels:
≥9), –143 to +13 dBm (Source: Ext, or Mod off)
RF output level
Accuracy:
±1.5 dB (–33.0 to +13.0 dBm, 10 to <100 MHz), ±2.0 dB (–33.0 to +13.0 dBm,
≥100 MHz), ±2.0 dB (–123 to –33.1
dBm,
≥10 MHz), ±3.5 dB (–136 to –123.1 dBm, 10 to <100 MHz), ±4.0 dB (–136 to –123.1 dBm, ≥100 MHz)
*
Number of multiplex channels: 1, long code: on, level control function: off
Chip rate
1.024, 4.096 Mcps
Root Nyquist:
α = 0.2, 0.22, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5
Baseband filters
Nyquist:
α = 0.2, 0.22, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5
Filter mode
EVM, NRM, ACP selectable
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