Datasheet

05 | Keysight | 53131A/132A/181A Counters - Data Sheet
Instrument Inputs (Continued)
Input specications
4
(Continued) Channel 3 (53131A, 53132A)
Channel 2 (53181A)
External arm input specications
5
Signal input range TTL compatible
Timing restrictions Pulse width > 50 ns
Transition time < 250 ns
Start-to-stop time > 50 ns
Damage level 10 Vrms
External arm input characteristics
5
Impedance 1 kΩ
Input capacitance 17 pF
Start/stop slope Positive or negative
External time base input specications
Voltage range 200 mVrms to 10 Vrms
Damage level 10 Vrms
Frequency 1 MHz, 5 MHz, and 10 MHz (53132A 10 MHz only)
Time base output specications
Output frequency 10 MHz
Voltage > 1 Vpp into 50 Ω (centered around 0 V)
1. Specifications and characteristics for Channels 1 and 2 are identical for both common and separate configurations.
2. Values shown are for X1 attenuator setting. Multiply all values by 10 (nominal) when using the X10 attenuator setting.
3. When the 53131A or 53132A are ordered with the optional rear terminals (Option 060), the channel 1 and 2 inputs are active on both front and rear of the
counter. When the 53181A is ordered with the optional rear terminal, the channel 1 input is active on both front and rear of the counter. For this condition,
specifications indicated for the rear connections also apply to the front connections.
4. When optional additional channels are ordered with Option 060, refer to configuration table for Option 060 under ordering info on page 8. There is no
degradation in specifications for this input, as applicable.
5. Available for all measurements except peak volts. External arm is referred to as external gate forsome measurements.