Atec Agilent-E4421B-24B-32B-33B-35B-36B - Manual (Page 17)

17
Multichannel, multicarrier
CDMA personality
(Option UN5, ESG-DP and ESG-D series only)
Chip (symbol) rate
1.2288 MHz (default)
Adjustable from 1 Hz to
10 MHz with 4x oversampling
Modulation
QPSK (forward) with Walsh and short code spreading
Offset QPSK (reverse) with short code spreading of
random data
Pre-defined channel configurations
(power levels per IS-97-A)
Pilot channel
Includes IS-95 modified filter, with equalizer
9 channel Includes pilot, paging, sync, 6 traffic and
IS-95 modified filter, with equalizer
32 channel Includes pilot, paging, sync, 29 traffic and
IS-95 modified filter, with equalizer
64 channel Includes pilot, 7 paging, sync, 55 traffic and
IS-95 modified filter, with equalizer
Reverse channel Includes IS-95 filter
Rho 0.9996
( ≤ 4 dBm, IS-95 filter, ≤ 2 GHz, typical)
Pilot time offset ≤ 2 µs, typical
User-defined CDMA
Channel table editor
Number of channels 1 to 256
Walsh codes
0 to 63
Channel power 0 to –40 dB
PN Offset 0 to 511
Data 00-FF(HEX) or random
Walsh code power selection
IS-97 compliant
Equal channel power
Scaled to 0 dB
User-defined
IS-95 filter selection
IS-95
IS-95 with equalizer
IS-95 modified
IS-95 modified with equalizer
All are IS-95 compliant. “Modified” filters reduce spurious
emissions for adjacent channel power measurements.
Other FIR filters
Nyquist, root Nyquist α = 0 to 1
Gaussian B
b
T = 0.1 to 1
Custom FIR Up to 256 coefficients
16-bit resolution
Automatically scaled
Oversample ratio
Range 2 to 8
Resolution 1
Multicarrier
Number of carriers 3 or 4 (predefined),
up to 12 (user-defined)
Carrier channels Pilot, 9 channel, 32 channel,
64 channel, reverse, custom
Frequency offset
(per carrier) ±7.5 MHz
Offset resolution <100 Hz
Carrier power
(per carrier) 0 dB to –40 dB
Clipping
Clip location Pre or post FIR filter
Clipping type |I+jQ|, |I| and |Q|
Clipping range 10% to 100%
(clip the modulation level to a
percentage of full scale. A level
of 100% equates to no clipping)
Multichannel CDMA spurious emissions 1
(dBc, with high crest factor on)
0.885 to 1.25 MHz 1.25 to 1.98 MHz 1.98 to 5 MHz 2
Channels/offsets Standard Option UNB Option H99 Standard Option UNB Option H99 Standard Option UNB Option H99
(Rev B) (Rev B) (Rev B)
Reverse (at ≤ 0 dBm)
30 – 200 MHz –66 (–72) –70 (–75) (–76) (–76) (–78) (–77) (–79) (–79) (–79)
700 – 1000 MHz –68 (–73) –72 (–76) –77 (–79) (–76) (–79) (–81) (–79) (–79) (–81)
1000 – 2000 MHz –63 (–66) –70 (–74) –77 (–79) (–70) (–78) (–81) (–79) (–79) (–81)
9/64 channels (at ≤–2 dBm)
30 – 200 MHz –65 (–68) –68 (–71) (–69) (–73) (–76) (–72) (–78) (–78) (–80)
700 – 1000 MHz –64 (–70) –69 (–73) –73 (–76) (–75) (–77) (–78) (–79) (–79) (–81)
1000 – 2000 MHz –60 (–63) –67 (–71) –71 (–74) (–68) (–75) (–77) (–78) (–78) (–81)
1. Parentheses denote typical performance.
2. Specifications apply with high crest factor off.