Signal Generator Agilent 8657B

ManufacturerAgilent
Series8657
Part Number8657B

Features

Prices

Detailed Description

  • AM and FM modulation
  • ±1 dB absolute level accuracy (typical ±0.5 dB)
  • 1 Hz frequency resolution
  • 0.3 GMSK for GSM and PCN cellular systems
  • < 3.5 rms phase error
  • 50 W reverse power protection

Signal Generator Agilent 8657B

Technical Specifications

 

8657A

8657B

Frequency

Range

100 kHz to 1.04 GHz

100 kHz to 2.6 GHz

Underrange

To 10 kHz with uncalibrated output and modulation.

Resolution

10 Hz

1 Hz

Accuracy and stability

Same as timebase

Switching speed

<35 ms (30 ms typical at 25 °C)

Phase offset

Output signal phase is adjustable in 1-degree nominal increments.

Internal
reference
oscillator

Aging rate

Std.

(typ.)

±2 ppm/yr

High–stability
Option 001

1.5 × 10–8 parts/day after 10 days
1.0 × 10–9 parts/day after 180 days

1.0 × 10–9 parts/day after 45 days

Temperature
(0 to 55 °C)

Std. (typ.)

±10 ppm

High–stability
Option 001

7 × 10–9

Line voltage

2 × 10–9 (+5%, –10%)

Frequency

Std. (typ.)

50 MHz

High-stability
Option 001

10 MHz

Timebase reference output (rear panel)

Available at a level of >0.15 Vrms into 50 Ω
(output of 10, 5, or 1 MHz is selectable via internal jumper).
If external reference is used, output will be the same frequency.

External reference input (rear panel)

Accepts any 10, 5, or 1 MHz ±0.002%)
Frequency standard at a level >0.15 Vrms into 50 Ω

Output

Range (dBm)

+13 dBm to –143.5 dBm into 50 Ω,
+10 dBm to –143.5 dBm for
frequencies from 100 kHz to 1 MHz

+13 dBm to –143.5 dBm into 50 Ω,
+10 dBm to –143.5 dBm with pulse
modulation installed at fc<1.03 GHz

Resolution

0.1 dB

Absolute level accuracy

<±1.5 dB (>+7 dBm)
<±1.0 dB (+7 to –127 dBm)
<±1.5 dB (<–127 dBm)

<±1.5 dB (>+3.5 dBm)
<±1.0 dB (+3.5 to –127 dBm)
<±1.5 dB (<–127 dBm)

Level flatness 100 kHz to 2.06 GHz

±0.5 dB, output level setting of 0 dBm

Reverse power protection
(to maximum output frequency)

50 watts (from a 50 Ω source)

Maximum DC voltage

50 V

25 V

SWR

<1.5 for levels < –3.5 dBm
<2.0 for levels ≤ +13 dBm
(fc(400 kHz)

<1.5 for levels ≤ –6.5 dBm
<2.0 for levels ≤ +13 dBm

Output impedance

50 Ω nominal

Spectral
purity

SSB phase noise
(in CW mode,
at 20 kHz offset)

0.1 to 130 MHz

<–124 dBc/Hz

130 to 260 MHz

<–136 dBc/Hz

260 to 520 MHz

<–130 dBc/Hz

520 MHz to 1.04 GHz

<–124 dBc/Hz

1.04 to 2.06 GHz

<–118 dBc/Hz

Residual FM
(CW mode, rms)

Frequency range

Post detection BW (rms detector)

8657A

8657B

300 Hz to 3 kHz

50 Hz to 15 kHz

300 Hz to 3 kHz

50 Hz to 15 kHz

0.1 to 130 MHz

<4 Hz

<6 Hz

<4 Hz

<6 Hz

130 to 260 MHz

<1 Hz

<1.5 Hz

<1 Hz

<1.5 Hz

260 to 520 MHz

<2 Hz

<3 Hz

<2 Hz

<3 Hz

520 MHz to1.04 GHz

<4 Hz

<6 Hz

<3 Hz

<4 Hz

1.04 to 2.06 GHz

<6 Hz

<8 Hz

<6 Hz

<8 Hz

Residual AM
(50 Hz to 15 kHz post-detection noise
bandwidth, in CW mode)

<0.04% AM

Frequency
modulation

Maximum FM
peak deviation

Center frequency

8657A

8657B

AC mode
(the lesser of)

DC mode

AC mode
(the lesser of)

DC mode

0.1 to 130 MHz

4000 x rate (Hz)
or DC mode
max. deviation

99 kHz

4000 x rate (Hz)
or DC mode
max. deviation

200 kHz

130 to 260 MHz

1000 x rate (Hz)
or DC mode
max. deviation

50 kHz

1000 x rate (Hz)
or DC mode
max. deviation

50 kHz

260 to 520 MHz

2000 x rate (Hz)
or DC mode
max. deviation

99 kHz

2000 x rate (Hz)
or DC mode
max. deviation

100 kHz

520 MHz to1.04 GHz

4000 x rate (Hz)
or DC mode
max. deviation

99 kHz

4000 x rate (Hz)
or DC mode
max. deviation

200 kHz

1.04 to 2.06 GHz

8000 x rate (Hz)
or DC mode
max. deviation

400 kHz

Resolution

100 Hz for deviations < 10 kHz;
1 kHz for deviations ≥ 10 kHz

100 Hz (200 Hz for carrier frequency
>1.04 GHz)
for deviations <20 kHz;
200 Hz (400 Hz for carrier frequency
>1.04 GHz)
for deviations >20 kHz

FM rate

Internal 400 Hz
and 1 kHz

±2%

External
(referenced to 1kHz)

dc/5 Hz to 100 kHz, 3 dB bandwidth;
dc/20 Hz to 50 kHz, 1 dB bandwidth

Center frequency
accuracy
in DC mode

Carrier frequency

 

0.1 to 130 MHz

±500 Hz

130 to 260 MHz

±125 Hz

260 to 520 MHz

±250 Hz

520 MHz to 1.04 GHz

±500 Hz

1.04 to 2.06 GHz

±1000 Hz

Center frequency stability in dc mode

<10 Hz per hour drift (typical <3 Hz per hour)

Distortion (at internal rates)

<0.5% THD plus noise
(typical <1.5% for all specified deviations and rates)

Sensitivity

1 Vpeak for indicated accuracy,
1 Vdc when in DC-FM mode

Indicator accuracy (internal rates)

<±5% of setting

Incidental AM
(peak deviations
< 20 kHz,
internal rates)

fc>500 kHz

<0.1% AM

fc>1.03 GHz

<0.5% AM

Amplitude
modulation

Range

0 to 99%,
level ≤ +7 dBm, fc ≥ 400 kHz

0 to 100%,
level ≤ +7 dBm, fc ≥ 400 kHz

0 to 30%,
level ≤ +10 dBm, fc ≥ 400 kHz
0 to 30%,
level ≤ +10 dBm, fc ≥ 400 kHz

Resolution

1%

Rates

Internal

400 Hz and 1 kHz, ±2%

External

20 Hz to 40 kHz (1 dB bandwidth)

typical, 20 Hz to 100 kHz
(3 dB bandwidth)

Distortion
(internal rates,
level <+7 dBm)

AM depth

fc

 

0 to 30%
AM

<1.04 GHz

1.5%

>1.04 GHz

4%

31 to 70%
AM

<1.04 GHz

<3.0%

>1.04 GHz

4%

71 to 90%
AM

<1.04 GHz

<4.0%

>1.04 GHz

7%

Sensitivity (typical)

1 Vpeak for indicated accuracy

Indicator accuracy
(for depths <90%
and internal rates and levels +7 dBm)

<±(2% + 6% of setting)

Incidental phase modulation
(at 30% AM depth, internal rates)

<0.3 radians peak

External modulation input

Front panel BNC, 600 Ω DC-coupled;
front panel annunciators indicate 1 V peak signal ±5%.

Modulating signal output

Internal modulating signal is provided at the front panel BNC connector
at nominally 1 V peak into a 600 Ω resistive load.

Simultaneous
modulation

Internal/External

AM/FM, FM/AM, AM/AM, FM/FM, AM/FM/(Pulse)

Internal/Internal

AM/FM

External/External

AM/FM

 

Pulse
modulation

On/off ratio fc

fc ≥ 130 MHz

>70 dB

fc ≥ 1.03 GHz

>95 dB

Rise/fall times

fc ≥ 130 MHz

>35 ns

fc ≥ 1.03 GHz

>50 ns

Maximum repetition rate

dc to 30 MHz, typical

Level accuracy

±1.0 dB, typical

Duty cycle

0 to 100%, typical
(limited by rise/fall time)

Pulse modulation input

BNC, high impedance
(internally selectable to 50 ohms),
can be driven directly by TTL

Maximum input level

±15 V, typical

Nominal input threshold

1.6 V, typical

Video feedthrough

<15%, typical

Pulse time delay

On to off

34 ns, typical

Off to on

47 ns, typical

Remote
programming

Interface

GPIB (IEEE-488)

IEEE-488 functions

SH0, AH1, T0, L2, SR0, RL1, PP0, DC1, DT0, C0, E1

General

Operating temperature range

0 to 55 °C

Storage temperature range

–40 to +71 °C

Save/recall/sequence storage registers

100 non-volatile registers are available to save front panel settings.

Rear-panel SEQ input level

TTL low to recall next storage register contents.

Power requirements

100 or 120 or 220
or 240 volts (+5%, –10%)
from 48 to 440 Hz;

100 or 120 or 220
or 240 volts (±10%)
from 48 to 440 Hz;

160 VA

200 VA

IEC 1010 compliant.

Weight

18.2 kg (40 lb)

20.5 kg (45 lb)

Dimensions

133 mm H × 425 mm W × 574 mm D
(5.25 in H × 16.75 in W × 22.6 in D)

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