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LEVELED OUTPUT POWER RANGE
Standard Units
Without an Attenuator: Maximum leveled power to
–15 dBm (–20 dBm typical).
With an Attenuator: Maximum leveled power to
–120 dBm.
With an Electronic Attenuator: Maximum leveled
power to–140 dBm.
Units with Option 15A, High Power
Without an Attenuator: Maximum leveled power to
–5 dBm (–10 dBm typical).
With an Attenuator: Maximum leveled power to
–115 dBm (–120 dBm typical). For units with a high fre
-
quency limit >40 GHz and units with Option 15A, mini
-
mum settable power is –105 dBm (–110 dBm typical).
With an Electronic Attenuator: Maximum leveled
power to –115 dBm (–110 dBm typical).
UNLEVELED OUTPUT POWER RANGE (typical)
Without an Attenuator: >40 dB below max power.
With an Attenuator: >130 dB below max power.
POWER LEVEL SWITCHING TIME (to within specified
accuracy):
Without Change in Step Attenuator: <3 ms typical
With Change in Step Attenuator: <20 ms typical
With Change in Electronic Step Attenuator: <3 ms
typical. Power level changes across –70 dB step will re-
sult in 20 ms delay.
ACCURACY AND FLATNESS
Accuracy specifies the total worst case accuracy. Flatness
is included with the accuracy specification.
Step Sweep and CW Modes
Analog Sweep Mode (typical)
OTHER OUTPUT POWER SPECIFICATIONS
Output Units: Output units selectable as either dBm or
mV. Selection of mV assumes 50W load. All data entry and
display are in the selected units.
Output Power Resolution: 0.01 dB or 0.001 mV
Source Impedance: 50W nomimal
Source SWR (Internal Leveling): <2.0 typical
Power Level Stability with Temperature:
0.04 dB/°C typical
Level Offset: Offsets the displayed power level to estab-
lish a new reference level.
Output On/Off: Toggles the RF output between an Off and
On state. During the Off state, the RF oscillator is turned off.
The On or Off state is indicated by two LEDs located below
the OUTPUT ON/OFF key on the front panel.
RF On/Off Between Frequency Steps: System menu se
-
lection of RF On or RF Off during frequency switching in
CW, Step Sweep, and List Sweep modes.
RF On/Off During Retrace: System menu selection of RF
On or RF Off during retrace.
Internal Leveling: Power is leveled at the output connec
-
tor in all modes.
External Leveling:
External Detector: Levels output power at a remote
detector location. Accepts a positive or negative 0.5 mV to
500 mV input signal from the remote detector. EXT ALC
ADJ adjusts the input signal range to an optimum value.
BNC connector, front and rear panel.
External Power Meter: Levels output power at a re
-
mote power meter location. Accepts a ±1V full scale input
signal from the remote power meter. EXT ALC ADJ ad
-
justs the input signal range to an optimum value. BNC
connector, front and rear panel.
External Leveling Bandwidth:
30 kHz typical in Detector mode.
0.7 Hz typical in Power Meter mode.
681XXC OM B-5
PERFORMANCE
SPECIFICATIONS
Attenuation
Below
Max Power
Frequency
(GHz)
0.01-20 20-40 40-50 50-60 60-65
Accuracy:
0-25 dB
Á
±1.0 dB ±1.0 dB ±1.5 dB ±1.5 dB ±1.5 dB
25-60 dB ±1.0 dB ±1.0 dB ±1.5 dB ±3.5 dB
À
N/A
>60 dB ±1.0 dB ±1.0 dB ±2.5 dB
À
±3.5 dB
À
N/A
Flatness:
0-25 dB
Á
±0.8 dB ±0.8 dB ±1.1 dB ±1.1 dB ±1.1 dB
25-60 dB ±0.8 dB ±0.8 dB ±1.1 dB ±3.1 dB
À
N/A
>60 dB ±0.8 dB ±0.8 dB ±2.1 dB
À
±3.1 dB
À
N/A
Attenuation
Below
Max Power
Frequency
(GHz)
0.01-0.05 0.05-20 20-40 40-65
Accuracy
0-12 dB ±2.0 dB ±1.0 dB ±2.0 dB ±3.0 dB
0-30 dB ±3.5 dB ±3.5 dB ±4.6 dB ±5.6 dB
30-60 dB ±4.0 dB ±4.0 dB ±5.2 dB ±6.2 dB
60-122 dB ±5.0 dB ±5.0 dB ±6.2 dB ±7.2 dB
Flatness
0-12 dB ±2.0 dB ±1.0 dB ±2.0 dB ±2.5 dB
0-30 dB ±3.5 dB ±3.0 dB ±4.1 dB ±5.1 dB
30-60 dB ±3.5 dB ±3.5 dB ±4.6 dB ±5.6 dB
60-122 dB ±4.0 dB ±4.0 dB ±5.2 dB ±6.2 dB
À
Typical
Á
0 to 25 dB or to minimum rated power, whichever is higher