HP 5345A 500 MHz Universal Counter

Product Summary

The HP 5345A is a high-performance microwave and millimeter-wave pulse frequency counter. Operating from dc to 500 MHz, the counter also makes sub-microwave measurements including frequency, period, totalization, ratio, and time interval. As a full universal counter, the HP 5345A features 2 ns single-shot timing resolution, improving to 2 ps with averaging.

The HP 5345A mainframe accommodates additional microwave products, including the HP 5355A Automatic Frequency Converter that extends operation to 1.5 GHz, and the HP 5356C Converter Head for measurements to 40 GHz. Together, the instruments provide an expandable range of capabilities for characterizing complex radar systems and components.

Product Features

• Output of more than 9000 measurements per second reduces test time

• Flexible external gating extends application

• Automatic averaging improves accuracy

• Standard high-stability timebase lowers cost of ownership

• 25 mV sensitivity

• Frequency with resolution of 9 digits per second

Output

Flexible Gating

Automatic Averaging

High-Stability Timebase

Product Specifications

Input Specifications (pulse and CW mode)

HP 5356C
	Frequency Range 1.5 - 40 GHz		
		Sensitivity (0-50 deg. C):
			0.4-1.5 GHz	--	
			1.5-12.4 GHz	-25 dBm
			12.4-18 GHz	-20 dBm
			18-26.5 GHz	-20 dBm
			26.5-34 GHz	-15 dBm
			34-40 GHz	-10 dBm

	Maximum Input: 
		0.4-1.5 GHz	--
		1.5-12.4 GHz	+5 dBm
		12.4-18 GHz	+15 dBm
		18-26.5 GHz	+15 dBm
		26.5-40 GHz	+15 dBm
		36-110 GHz	--

	Damage Level: +25 dBm peak

	Impedance: 50 ohm NOMINAL

	SWR: (typical)
		0.4-1.5 GHz	--
		1.5-10 GHz	<2:1
		10-18 GHz	<3:1
		18-26.5 GHz	<3:1
		26.5-34 GHz	<3:1
		34-40 GHz	<5:1
		36-110 GHz	--

	Connector: APC 3.5 male with collar



HP 5345A/55A
	Frequency Range: 0.4-1.5 GHz	
	
		Sensitivity (0-50 deg. C):
			0.4-1.5 GHz	-15 dBm 	
			1.5-12.4 GHz	--	
			12.4-18 GHz	--
			18-26.5 GHz	--
			26.5-34 GHz	--
			34-40 GHz	--

	Maximum Input: 

	Damage Level: +24 dBm peak (use in BNC Connector)

	Impedance: 50 ohm NOMINAL

	SWR: (typical)
		0.4-1.5 GHz	<2:5:1

	Connector: BNC




CW Mode
HP 5356C
	FM Tolerance:
		Auto Mode: 60 MHz p-p, rate: dc - 10 MHz
		Man Mode: 80 MHz p-p, rate: dc - 10 MHz

	AM Tolerance: Any modulation index provided the minimum signal level 
		is greater than the counter sensitivity.

	Acquisition Time (typical): 
		Auto Mode: 1.4s (Option 001: 1.1s)
		Man Mode: 15 ms

	Measurement Time (typical):

		GATE TIME <= 100 ms:
			Acquisition time + 4 x HP 5345A GATE TIME + HP 5345A Sample 
			Rate + 125 ms

		GATE TIME > 100 ms:
			Acquisition Time + HP 5345A GATE TIME + HP 5345A Sample 
			Rate + 35 ms

	LSD: 1 divided by 5345A GATE TIME

	Resolution: +/-2 x LSD +/- 10e-10 RMS x FREQ

	Accuracy (after 1 min. warmup): Resolution +/- Timebase error x FREQ

	FM Tolerance:
		Auto Mode: 60 MHz p-p, rate dc - 10 MHz
		Man Mode: 80 MHz p-p, rate: dc - 10 MHz

	AM Tolerance: Any modulation index provided the minimum signal 
		level is greater than the counter sensitivity.

	Acquisition Time (typical): 
		Auto Mode: 1.4s (Option 001: 1.1s)
		Man Mode: 15 ms

	Measurement Time (typical):

		GATE TIME <= 100 ms:
			Acquisition time + 4 x HP 5345A GATE TIME + HP 5345A Sample 
			Rate + 125 ms

		GATE TIME > 100 ms:
			Acquisition Time + HP 5345A GATE TIME + HP 5345A Sample 
			Rate + 35 ms

	LSD: 1 divided by 5345A GATE TIME

	Resolution: +/-2 x LSD +/- 10e-10 RMS x FREQ

	Accuracy (after 1 min. warmup): Resolution +/- Timebase error x FREQ




HP 5345A/55A
	FM Tolerance: Instantaneous frequency must not exceed 0.,4-1.5 GHz range

	AM Tolerance: Any modulation index provided the minimum singal level 
		is greater than the counter sensitivity.

	Acquisition Time (typical): 
		FREQ >= 800 MHz: <1 ms
		FREQ <800 MHz: HP 5345A Sample rate + 35 ms

	Measurement Time (typical):
		Acquisition time + HP 5345A GATE TIME + HP 5345A Sample Rate + 35 ms

	LSD: 1 divided by 5345A GATE TIME

	Resolution: +/-5 x LSD

	Accuracy (after 1 min. warmup): Resolution +/- Timebase error x FREQ




Pulse Mode

HP 5356C
	FM Tolerance: 
		Input Auto Mode: 50 MHz p-p, Chirp
		Input Man Mode: 80 MHz p-p, Chirp

	Measurement Time (typical):

		Input Auto Mode:Input Man Mode:
			Acquisition Time + Calibration Time + HP 5345A SAMPLE RATE + 
			60 ms + ((1 us + HP 5345A GATE TIME) / (EXT GATE WIDTH x PRF))

	Pulse Width:
		Input Auto Mode:
			Min: 100 ns
			Max: 20 ms
		Input Man Mode:
			Min: 75 ns
			Max: 20 ms

	Pulse Repetition Frequency:
		Input Auto Mode:
			Min: 50 Hz
			Max: 2 MHz
		Input Man Mode:
			Min: 50 Hz
			Max: 2 MHz

	Maximum Video Feed-Through: 15 mV p-p typical for 
		RF burst rise and fall times >10 ns.

	Accuracy (after 1 min. warmup):
		+/-2 x LSD +/- rms Jitter +/- Gate Error +/- Timebase Uncertainty




HP 5345A/55A
	FM Tolerance: Instantaneous frequency must not exceed 
		0.4-1.5 GHZ range

	Measurement Time (typical):
		Acquisition Time + Calibration Time + HP 5345A SAMPLE RATE + 60 ms +
		((1 us + HP 5345A GATE TIME) / (EXT GATE WIDTH x PRF))						

	Pulse Width:
		Min: 150 ns
		Max: 1 s

	Pulse Repetition Frequency:
		Min: 100 Hz
		Max: 1 MHz

	Maximum Video Feed-Through: 15 mV p-p typical for rf burst rise
		and fall times >10 ns.

	Accuracy (after 1 min. warmup):
		+/- (16 x LSD) +/- (5 x rms Jitter) +/- Gate Error +/- 
		Timebase Uncertainty




HP 5345A Inputs, Separate Inputs:
Range: 
	(dc coupled): 0 to 500 MHz 
	(ac coupled, 50 ohm): 4 MHz to 500 MHz
	(ac coupled, 1 Mohm): 200 Hz to 500 MHz

Impedance: selectable, 1 Mohm (nominal) shunted by approximately 
	45 pF or 50 ohm (nominal).

Sensitivity:
	X1:	25 mV rms sine wave and 75 mV peak-to-peak
	X10:	300 mV sine wave and 900 mV peak-to-peak pulse

Dynamic Range (50 ohm and 1 Mohm):
	X1:	25 mV to 300 mV rms sine wave and 75 mV to 900 mV p-p pulse
	X10:	300 mV to 2.0 V rms sine wave and 900 mV to 6.0V p-p pulse

Linear Operating Range: -2.0 to +2.0V dc (nominal)

Trigger Level: Adjustable over +/- 2.0V dc

	Preset:	centers trigger level to 0V dc (nominal) at 25 degrees C

	Drift:	+/-10 mV dc max., 0 degrees C to 50 degrees C

	Output:	Channel A and B trigger voltages (x ATTEN) available at
		rear panel BNC connectors

	Accuracy:
		X1:	+/-15 mV
		X10:	+/-150 mV (nominal)

Slope: independent selection of positive or negative slope

Maximum Input:

	50 ohm, X1:	+/-7V dc, 7V rms below 5 MHz, 3.5 Vrms (+24 dBm)
				5 MHz and above

	1 Mohm, X1:	+/-350V dc, 250V rms to 20 kHz, decreasing to 3.5V rms
				above 5 MHz

	1 Mohm, X10:	+/- 350V dc, 250V rms to 20 kHz, decreasing to 35V rms
				above 5 MHz



HP 5345A Inputs, Common Input
Range:
	dc coupled:		0-400 MHz
	ac coupled, 50 ohm:	4-400 MHz
	ac coupled, 1 Mohm:	300 Hz-400 MHz

Impedance: 50 ohms remains 50 ohms; 1 Mohm becomes 500 kohm (nominal)
	shunted by approximately 80 pF.

Sensitivity:
	50 ohm, X1:	50 mV rms sine wave and 150 mV p-p pulse
	50 ohm, X10:	600 mV rms sine wave and 1.8V p-p pulse
	1 Mohm:		<=50 MHz =  25 mV rms
			50-200 MHz = 75 mV rms
			200-400 MHz = 120 mV rms

Dynamic Range:
	50 ohm, X1:	50 mV to 600 mV rms sine wave and 150 mV to 1.8V p-p pulse
	50 ohm, X10:	600 mV to 4.0V rms sine wave and 1.8V to 12V p-p pulse
	1 Mohm:		same as Separate Inputs

Maximum Input:
	50 ohm:		+/-5.0V dc or 5V rms
	1 Mohm:		same as Separate Inputs

Trigger Level: adjustable over the range +/-4.0V dc (X ATTEN) in 50 ohm or
	+/-2.0V dc in 1 Mohm (X ATTEN)

	Output:	Channel A and B trigger voltages times 2 (X ATTEN) available
		at rear panel BNC connectors

	Accuracy:
		50 ohm, X1:	+/-30 mV nominal
		50 ohm, X10:	+/-300 mV nominal
		1 Mohm:		same as Separate Inputs




Frequency
Range: 0.00005 Hz to 500 MHz

Resolution: +/- LSD +/- ((Noise Trigger Error) / (Gate Time)) x Frequency
	Lease significant digit (LSD) is nine digits per second of measurement time.
	With DISPLAY POSITION switch in AUTO, the LSD error is +/-1 count if the most
	significant digit (MSD) is 1 through 4, and +/-2 counts if the MSD is 5
	through 9.

Accuracy: Resolution +/- Timebase Error x Frequency

Measurement Time: When in MIN the GATE TIME is 50 ns or one period of the
	input signal, whichever is greater. When the GATE TIME is set to one of the
	decade steps, the counter will reset if a stop trigger is not reached within
	3.5 times the GATE TIME setting. Decade GATE TIME settings range from 100 ns
	to 1000s.

	When using EXT GATE, the measurement cycle time consists of the GATE TIME
	divided by the duty cycle of the EXT GATE signal plus the time required to
	reach the next STOP trigger level after the end of the last EXT GATE pulse.




General
Display: 11-digit LED display and sign. Decimal point is positioned with
	DISPLAY POSITION control or positioned after the first, second or third most
	significant digit if DISPLAY POSITION is in AUTO.

Sample rate: rate continuously variable from <0.1s to <5s with front-panel
	control. In HOLD position the last reading is maintained until the counter
	is reset or an EXT ARM signal is applied.

External arm input: counter can be armed by a -1.0V (-5.0V max) signal applied to
	the rear panel 50 ohm input for greater than 500 ns. Minimum time between
	EXT ARM and acceptance of start pulse is <1 us (typical).

Operating temperature: 0 degrees C to 50 degrees C.

Power requirements: 100/120/220/240V rms +5% -10% 48 to 66 Hz, maximum
	power 250 VA.

Size: 132.6 mm H x 425 mm W x 495 mm D (5.22 in x 16.75 in x 19.95 in);
	17kg (37 lb).

Product Ordering Information

HP 5345A	Plug-In Counter
   Opt 011	HP-IB Interface (no input amplifier control)
   Opt 012	HP-IB Interface (with input amplifier control)
   Opt 908	Rack mounting kit
   Opt 910	One additional manual
   Opt W30      3 Year Return Repair Service
   Opt W32      3 Yr Calibration Customer Return Svc.
   Opt W34      3 Year Standards Compliant Cal Service
   Opt W50      5 Year Return Repair Service
   Opt W52      5 Year Cust Return Calibration Service
   Opt W54      5 Year Standards Compliant Cal Service


HP 5355A	Automatic Frequency Converter

HP 5356C	Frequency Converter Head

To help you make the right instrument choices

Your Field Sales Engineer is ready to answer your questions about specifications, applications and ordering. Find your Field Sales Engineer at your Local Sales Office.

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Page Updated: Thursday June 19 16:16:14 UTC 1997