PANASONIC LUMIX - DMC-GH2 SLR/HD Camcorder -
| LINDOS AUDIO SEQUENCE TEST | PANASONIC LUMIX - DMC-GH2 SLR/HD Camcorder - |
| SOURCE MS20 V1.3 | N audio gain setting, wind-noise filter OFF |
| 13-Mar-11 12:35 AM | TOLERANCE Lindos GradeB FAILED |
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FREQUENCY RESPONSE @0dB [u]
| 20Hz | -11.74* | -11.63* | +3-6 |
| 31Hz | -8.13* | -7.99* | ±3 |
| 40Hz | -6.24* | -6.24* | ±2 |
| 50Hz | -4.88* | -4.88* | ±2 |
| 100Hz | -1.75 | -1.75 | ±2 |
| 315Hz | -0.13 | -0.13 | ±2 |
| 1k0 | -0.01 | -0.01 | ±2 |
| 6k3 | -0.50 | -0.50 | ±2 |
| 10k0 | -1.38 | -1.25 | ±2 |
| 12k5 | -2.00 | -2.00 | ±2 |
| 14k0 | -2.24 | -2.13 | ±3 |
| 16k0 | -2.38 | -2.38 | |
| 20k0 | -22.13 | -22.13 | |
| 25k0 | -22.13 | -22.13 | |
LEVEL VS LEVEL [h]
TEST LEVEL OUT 400Hz [t]
| TL dB | -00.28 | -00.29 | ±1.5<1 |
| DELms | | | <100 |
SPEED ERROR [e]
NOISE ITU-468 Q-Pk REL [m]
DIST RES 1kHz WTD REL [r]/q
| -20dB | -31.74 | -31.92 | -25 |
| 0dB | -48.93 | -48.30 | -30 |
| +8dB | -49.24 | -49.17 | -30 |
| +12dB | -50.00 | -50.11 | -30 |
| +15dB | -49.74 | -49.76 | -30 |
| +18dB | -48.90 | -48.84 | |
PHASE DIFFERENCE R-L [z]
| 3k15 | 00.00 | | ±45 |
| 10k0 | 00.00 | | ±90 |
| 15k0 | 04.00 | | |
Exellent micro 2/3 video recorder (set to 1080i), but let down by marginal sound quality with the usual (unexplained) low-frequency rolloff, a less serious HF rolloff (cutting off at 16kHz) and a rather high noise level.
Tested with input signal set to alignment level = -30dBu single ended the headroom is only 4dB. Dynamic range (468-wtd) is thus barely 4+52 = 56dB. The Sony FX1 from which I get very acceptable recordings has 18+54 = 72dB. A good 16bit recorder or CD player should have 18+68 = 86dB!! This camera can give reasonable sound with carefully optimised levels and EQ, but what a pity Panasonic consider this to be acceptable.
Note that automatic gain control still operates above +4dBAL as indicated by the low distortion levels right up to +18dBAL. This has a slowish (1 to 2 sec recovery time) so it may be possible to set input level on the high side for max possible dynamic range and get away without undue distortion (albeit with compression). |
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