Signal Generator Agilent 8657A

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

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)