Author Topic: FS/For Sale in Germany/EU: new price Panasonic VP-7723A Audio Analyzer with GPIB  (Read 500 times)

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Offline THDplusN_bad

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Good Day,

for sale is a Panasonic VP-7723A Audio Analyzer, up to 110 kHz.

  • The unit is in a good state, with a few stains from other equipment's rubber feet on the top cover and a few cosmetic issues/scratches on the front. Nothing is bent or broken.
  • Specified at better than -80 dB THD+N up to 110 kHz, and -100 dB THD+N 20 Hz to 15 kHz with 80 kHz bandwidth.
  • The unit is beating its own specifications by far, which I have verified with an Audio Precision AP555 Audio Analyzer. Very good linearity and a typ. performance of the oscillator of >110 dB THD+N.
  • I am including some performance figures as measured below. I am happy to provide screenshots taken from the AP555 measurements and pictures of the unit per email upon request.
  • This unit has a GPIB-interface, the wow and flutter option and option 20. When used with a GPIB-adapter and some programming, one can turn this into a "poor-man's Audio Precision". I am happy to provide some screenshots taken from my LabView program to illustrate this. If sold to a fellow enthusiast here, I will provide the LabView code for free.
  • Specifications are available here, see last page: http://www.testequipmenthq.com/datasheets/PANASONIC-VP-7723A-Datasheet.pdf

updated price - I am asking 750€ 650€ or best offer and would prefer local pick-up in Germany, Munich, Stuttgart or Nürnberg. I can ship the item within Europe, but would need to source a card box etc. for proper packaging.

Thanks,

THD+N_bad

Panasonic VP-7723A

VP-7723A measuring its own distortion, oscillator output directly connected to analyzer input, Auto-tune notch filter enabled

10 Vrms: THD+N: -103.7 dB (unweighted, no filtering or full measurement bandwidth), measured amplitude: 10.28 Vrms
10 Vrms: THD+N: -107.3 dB (unweighted, 80 kHz measurement bandwidth filter enabled)
10 Vrms: THD+N: -108.3 dB (unweighted, 20 kHz measurement bandwidth filter enabled)
10 Vrms: THD+N: -108.3 dB (unweighted, 15 kHz measurement bandwidth filter enabled)
10 Vrms: THD+N: -108.2 dB (unweighted, 100 Hz and 20 kHz measurement bandwidth filter enabled)
10 Vrms: THD+N: -108.5 dB (unweighted, 200 Hz and 20 kHz measurement bandwidth filter enabled)

2 Vrms: THD+N: -100.5 dB (unweighted, no filtering or full measurement bandwidth), measured amplitude: 2.033 Vrms
2 Vrms: THD+N: -104.8 dB (unweighted, 80 kHz measurement bandwidth filter enabled)
2 Vrms: THD+N: -105.7 dB (unweighted, 20 kHz measurement bandwidth filter enabled)
2 Vrms: THD+N: -105.8 dB (unweighted, 15 kHz measurement bandwidth filter enabled)
2 Vrms: THD+N: -105.7 dB (unweighted, 100 Hz and 20 kHz measurement bandwidth filter enabled)
2 Vrms: THD+N: -105.9 dB (unweighted, 200 Hz and 20 kHz measurement bandwidth filter enabled)

1 Vrms: THD+N: -98.8 dB (unweighted, no filtering or full measurement bandwidth), measured amplitude: 1.017 Vrms
1 Vrms: THD+N: -107.3 dB (unweighted, 80 kHz measurement bandwidth filter enabled)
1 Vrms: THD+N: -108.8 dB (unweighted, 20 kHz measurement bandwidth filter enabled)
1 Vrms: THD+N: -109.1 dB (unweighted, 15 kHz measurement bandwidth filter enabled)
1 Vrms: THD+N: -109 dB (unweighted, 100 Hz and 20 kHz measurement bandwidth filter enabled)
1 Vrms: THD+N: -109.1 dB (unweighted, 200 Hz and 20 kHz measurement bandwidth filter enabled)

200 mVrms: THD+N: -82.4 dB (unweighted, no filtering or full measurement bandwidth), measured amplitude: 204.2 mVrms
200 mVrms: THD+N: -99.5 dB (unweighted, 80 kHz measurement bandwidth filter enabled)
200 mVrms: THD+N: -103.6 dB (unweighted, 20 kHz measurement bandwidth filter enabled)
200 mVrms: THD+N: -104.2 dB (unweighted, 15 kHz measurement bandwidth filter enabled)
200 mVrms: THD+N: -103.8 dB (unweighted, 100 Hz and 20 kHz measurement bandwidth filter enabled)
200 mVrms: THD+N: -104.2 dB (unweighted, 200 Hz and 20 kHz measurement bandwidth filter enabled)

Performance testing with Audio Precision AP555 and APx 600 V4.6.0.255.130221 Software:

1) Panasonic VP-7723A oscillator output tests:

With 10 Hz to 22.4 Hz measurement bandwidth, using the AP555 high-performance sine analyzer:
Measured 2.035 Vrms
At 0 dBV output settings into 600 Ohm, or 2 Vrms into high-impedance load; Measured THD+N -115.9 dB(unw.)
At +14 dBV resulting in 10.25 Vrms: Measured THD+N -116.4 dB(unw.)

With AES-17 filter used for 20 kHz measurement bandwidth, using the AP555 high-performance sine analyzer:
At 0 dBV output settings into 600 Ohm, or 2 Vrms into high-impedance load:  Measured THD+N -116.1 dB(unw.)
At +14 dBV setting resulting in 10.25 Vrms: Measured THD+N -116.4 dB(unw.)

High-bandwidth measurements:
10 Hz to 90 kHz measurement bandwidth, using the AP555 high-performance sine analyzer:
At 0 dBV output settings into 600 Ohm, or 2 Vrms into high-impedance load: Measured THD+N -113.8 dB(unw.)
At +14 dBV setting resulting in 10.25 Vrms: Measured THD+N -114.9 dB(unw.)

**********************
2) Panasonic VP-7723A analyzer and input tests:

When using the APx555's high-performance sine generator with 2 Vrms output, 1 kHz sine wave, the VP-7723A measures as follows:

-105.9 THD+N and 1.996 Vrms, displays +6 dB (with 200 Hz HP-filter and 20 kHz LP-filter enabled)
-105.9 THD+N and 1.996 Vrms, displays +6 dB (with 15 kHz LP-filter enabled)
-105.7 THD+N and 1.996 Vrms, displays +6 dB (with 20 kHz LP-filter enabled)
-104.8 THD+N and 1.997 Vrms, displays +6 dB (with 80 kHz LP-filter enabled)
-100 dB THD+N and 1.997 Vrms, displays +6 dB (unlimited bandwidth, no filter)

High-level measurements, all with a 1 kHz sine wave
APx 555 output:2 Vrms, VP-7723A measures: 1.996 mVrms
APx 555 output:5 Vrms, VP-7723A measures: 5.01 Vrms
APx 555 output:10 Vrms, VP-7723A measures: 10.02 Vrms
APx 555 output:12 Vrms, VP-7723A measures: 11.86 Vrms

Low-level measurements, all with a 1 kHz sine wave:
APx 555 output:1 Vrms, VP-7723A measures: 1.000 mVrms
APx 555 output:500 mVrms, VP-7723A measures: 0.500 Vrms
APx 555 output:200 mVrms, VP-7723A measures: 199.7 mVrms
APx 555 output:100 mVrms, VP-7723A measures: 99.9 mVrms
APx 555 output:50 mVrms, VP-7723A measures: 50.0 mVrms
APx 555 output:20 mVrms, VP-7723A measures: 20.1 mVrms
APx 555 output:10 mVrms, VP-7723A measures: 10.1 mVrms
APx 555 output:5 mVrms, VP-7723A measures: 5.1 mVrms
APx 555 output:2 mVrms, VP-7723A measures: 2.1 mVrms
APx 555 output:1 mVrms, VP-7723A measures: 1.1 mVrms
APx 555 output:500 µVrms, VP-7723A measures: 0.6 mVrms
APx 555 output:200 µVrms, VP-7723A measures: 0.3 mVrms
APx 555 output:100 µVrms, VP-7723A measures: 0.2 mVrms

AC level over frequency, 1 Vrms sine wave
Input 5 Hz, VP-7723A measures: 0.970 Vrms (Slow response settling enabled)
Input 10 Hz: VP-7723A measures: 0.986 Vrms (Slow response settling enabled)
Input 20 Hz: VP-7723A measures: 0.993 Vrms (Slow response settling enabled)
Input 50 Hz: VP-7723A measures: 0.995 Vrms
Input 100 Hz: VP-7723A measures: 0.993 Vrms
Input 200 Hz: VP-7723A measures: 0.994 Vrms
Input 500 Hz: VP-7723A measures: 0.998 Vrms
Input 1 kHz: VP-7723A measures: 1.000 Vrms
Input 2 kHz: VP-7723A measures: 0.998 Vrms
Input 5 kHz: VP-7723A measures: 0.998 Vrms
Input 10 kHz: VP-7723A measures: 0.999 Vrms
Input 20 kHz: VP-7723A measures: 0.999 Vrms
Input 50 kHz: VP-7723A measures: 1.001 Vrms
Input 100 kHz: VP-7723A measures: 1.012 Vrms
Input 110 kHz: VP-7723A measures: 1.014 Vrms (specified upper limit for VP-7723A)
Input 200 kHz: VP-7723A measures: 1.058 Vrms
« Last Edit: February 14, 2020, 05:13:23 pm by THDplusN_bad »
 

Offline Zucca

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Can't know what you don't love. St. Augustine
Can't love what you don't know. Zucca
ON SALE: HP 6642A 20V 10A
 

Offline THDplusN_bad

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  • Posts: 23
  • Country: de
Good Day,

Updated price to 650€ - c'mon, chaps, I need the bench space and so let's do this!

There is a similar unit for sale from a dealer on ebay for 1,240€... see eBay auction: #293134971230 - just to put this into perspective.

Cheers,

THD+N-bad
 

Offline Noy

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  • Country: de
Hi,
send a PM.
Please check.

Best regards
Felix
 


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