8648B AGILENT TECHNOLOGIES, 8648B Datasheet - Page 11

• Manufacturer Part Number: 8648B
• Description: SIGNAL GENERATOR FREQUENCY / PULSE, 2GHZ
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 8648B

• Signal Generator Type: Signal
• Bandwidth: 2GHz
• Modulation Type: AM, FM, Phase
• Supply Voltage Range: 90V To 264V
• External Height: 165mm
• External Width: 330mm
• External Depth: 368mm
• Lead Free Status / RoHS Status: na

1. PN15 is not continuous in bursted mode when TETRA is operated in a downlink mode.
2. Baseband I/Q ouputs cannot be scaled for GSM and DECT.
3. Specifications apply for the frequency range, symbol rates, root Nyquist filter, filter factors, and default scaling factor specified for each standard.
4. Baseband I/Q outputs cannot be scaled for FSK and MSK.
5. Filter factor (a or BbT) is set to 0.5.
I/Q baseband generator
(Option UN8, ESG-DP and ESG-D series only)
Modulation
PSK
MSK
QAM
FSK
I/Q:
Filter
Selectable
Custom FIR
Symbol rate
For external data or internal PN sequences in pattern mode,
symbol rate is adjustable from 200 symbols/sec to maximum
listed in table.
Bits/symbol
1
2
3
4
5
6
7
8
For all other data types and data structures the maximum bit rate
is 5 Mbits/sec.
TDMA data structure
Frames and timeslots may be configured as different types of
traffic or control channels. The data field of a timeslot can accept a
user file, PRBS (PN9 or PN15), or external data. Maximum bit rate
is 5 Mbits/sec.
Reference frequency
Internal or external 1, 2, 5, 10 MHz reference
Data clock can be locked to an external 13 MHz (GSM) reference
Custom:
Deviation:
Resolution:
Maximum symbol
rate (Msym/sec)
12.5
12.5
8.33
12.5
10
8.33
7.14
6.25
BPSK, QPSK, OQPSK, /4DQPSK,
8PSK, 16PSK, D8PSK
User-defined phase offset from
0 to 100°
4, 16, 32, 64, 256
Selectable: 2, 4, 8, 16 level
symmetric
Custom map of up to 16 deviation
levels
Modulation index 1,
Modulation index 0.5,
0.1 Hz
Custom map of 16 unique values
for I and Q
Nyquist, root Nyquist, Gaussian,
rectangular
256 coefficients, 16-bit resolution,
16 symbols long, automatically
scaled
: 0 to 1, B
1.5 Msym/sec
2.0 Msym/sec
Maximum data
rate (Mbits/sec)
12.5
25
25
50
50
50
50
50
b
T: 0.1 to 1
Frame trigger delay control
Range
Resolution
Data types
Internally generated data
Downloadable data
Externally generated data
Internal burst shape control
Varies with standards and bit rates
Rise/fall time range
Rise/fall delay range
I/Q outputs
(Baseband I/Q outputs can be scaled from 0 to 1 V
50 )
Standard
NADC, PHS, PDC
TETRA
GSM, DECT
EVM (NADC, PDC, PHS, TETRA)
Global phase error (GSM)
Deviation accuracy (DECT)
I/Q outputs
(Baseband I/Q outputs can be scaled from 0 to 1 V
Custom format
FSK, MSK
QPSK, BPSK
8PSK, 16PSK, D8PSK
QAM
/4DQPSK
)
Pseudo-random patterns (meets ITU-T standard)
Repeating sequence
Maximum bit rate
Direct-pattern RAM (PRAM)
User file
Type
Inputs
4
Max size
Use
Max size
Use
2
5
3
Default scaling Maximum V (rms)
100
65
N/A
Default scaling Maximum V (
NA
70
70
70
70
3
0 to 65,535 bits
1 bit
Continuous PN9 (PRBS 2
(PRBS 2
(PRBS 2
PN23 (PRBS 2
Any 4-bit sequence
5 Mbits/sec
1 Mbytes (standard)
8 Mbytes (Option UN9)
Nonstandard framing
128 kbytes
Continuous modulation or internally
generated TDMA standard
Serial data
Data, bit/symbol clocks
Accepts data rates ±5% of
specified data rate
3
Up to 30 bits
0 to 63.5 bits
11
15
–1), PN15
–1), PN20 (PRBS 2
1% rms
0.75° rms
1 kHz rms
23
0.25
0.25
0.35
0.20
0.25
> 0.10
0.35
0.32
–1).
1
peak-to peak
peak-to peak
9
–1) PN11
rms
20
into 50
into
)
–1),
11