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DC Blocker - why not?
Dear sirs,
I have a E8285A service monitor, and I know I can put no DC voltage on its inputs. So I have 3 questions: - Can I keep a DC blocker permanently connected to its inputs? - Is there a quality difference on a HP DC blocker and a chinese one? - Why it doesnt come standard from factory? Thanks! Alexandre, PU2SEX - GG66QM |
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Re: E8285A - how to backup calibration data?
Em 11/06/2021 20:57, Hank Riley via groups.io escreveu:
Did you try Jeff's cal data program yet?? I also have an 8285 but don't have the old laptop quite ready to run where the heavy HP is.Yep, just tried it right now After making the hardware connection (null-modem cable to SERIAL 9 - no, it won't work on serial 10) I was able to upload the program to E8285A and start it. It returned a series of "Processing XXXXXXXX" and in the end, got a "Done!!" on the E8285A and a file with all these "processing" messages. I'll paste the file containts here Maybe this program isn't adequated to E8285A? Thanks Alexandre (Output of program to cal file:) ======== SPEC AN CALIBRATION RECORDS DUMP ======== Processing VFN_COEFF... Processing AFA_DET2... Processing AFA_DET1... AFA_DEMOD Processing AFG_CAL... Processing INST_SER_NUM... Processing MIXER_FRQ... Processing FM_SENS_FRQ... Processing FM_SENS_SGN... Processing FM_SENS_MULT... Processing FM_ACFM_DAC... Processing RCVR_GAIN... Processing RCVR_DET_PWR... Processing SPA_CAL_TONE... Processing SPA_INP_GAIN... Processing SPA_BW_GAIN... Processing SPA_BW_FRQ... Processing SPA_PATH_2DB... Processing SPA_PATH_1DB... Processing LOG_AMP_PWR... Processing LOG_AMP_VOLT... Processing VM_SLOPE_OFS... Processing VM_CAL... LPF_FRQ Processing LPF_RD40... Processing LPF_RD20... Processing LPF_RD0... Processing LPF_RR20... Processing LPF_RR0... Processing LPF_A20... Processing LPF_A0... Processing BPF_RD40... Processing BPF_RD20... Processing BPF_RR40... Processing BPF_RR20... Processing BPF_A40... Processing BPF_A20... Processing TBPF350_NPT... Processing TBPF350_FRQ... Processing TBPF350_RD20... Processing TBPF350_RD0... TBPF350_RR40 Processing TBPF350_RR20... Processing TBPF350_RR0... Processing TBPF350_D3... Processing TBPF350_D1... Processing TBPF350_A40... Processing TBPF350_A0... Processing TBPF650_NPT... Processing TBPF650_RD40... Processing TBPF650_RD20... Processing TBPF650_RR40... Processing TBPF650_RR20... Processing TBPF650_D3... Processing TBPF650_D2... Processing TBPF650_A40... Processing TBPF650_A20... Processing OUT_TUNE_FRQ... Processing OUT_TUNE_DAC... Processing OUT_LVL_FRQ... Processing OUT_LVL_OFS... OUT_LVL_GAIN Processing OUT_LOSS_FRQ... Processing OUT_RF_0DB... Processing OUT_RF_5DB... Processing OUT_RF_15DB... Processing OUT_RF_20DB... Processing OUT_RF_30DB... Processing OUT_RF_35DB... Processing OUT_DX_0DB... Processing OUT_DX_5DB... Processing OUT_DX_15DB... Processing OUT_DX_20DB... Processing OUT_DX_30DB... Processing OUT_DX_35DB... Processing OUT_DX_45DB... Processing OUT_DX_50DB... Processing OUT_DX_60DB... Processing OUT_DX_65DB... OUT_DX_70DB Processing OUT_DX_75DB... Processing OUT_DX_80DB... Processing OUT_DX_85DB... Processing OUT_DX_95DB... Processing OUT_DX_100DB... Processing OUT_DX_110DB... Processing OUT_DX_115DB... Processing OUT_DX_125DB... Processing INP_RLY_CNT... Processing NOM_HI_PWR... Processing OUT_INPUT... Processing PWR_RMS_FRQ... Processing PWR_EMR_FRQ... Processing PWR_OFS... Processing PWR_VOLTS... Processing PWR_DET_OFS... Processing PWR_DET_GAIN... Processing PWR_DET_MWTT... Processing PWR_CW_OFS... PWR_CW_VOLT Processing PWR_CW_MWATT... Processing PWR_CON... Processing PWR_COEFF_RF... Processing EBNO_LVL... Processing EBNO_LVL_CAL... Processing IQ_GAIN... Processing I_OFFSET... Processing Q_OFFSET... Processing Q_DC_OFFSET... Processing SIGNAL_DELTA... Processing NOISE_DELTA... Processing CHNA_IQ_GAIN... Processing CHNA_I_OFFS... Processing CHNA_QUAD... Processing CHNB_IQ_FREQ... Processing CHNB_I_OFFS... Processing CHNB_Q_OFFS... CHNB_QUAD Processing TM_IQ_FREQ... Processing TM_IQ_GAIN... Processing TM_Q_OFFSET... Processing TM_QUADRATUR... Processing SMPLR_TRG_OF... Processing SMPLR_SCL_5... Processing SMPLR_SCL_15... Processing SMPLR_PATH... Processing CPM_RF_CAL... Processing VGA_GAIN... Processing VGA_DAC... Processing PRE_CUTOFF_V... Processing PRE_DET_OFS... Processing PRE_FRQ... Processing PRE_A20UL_RF... Processing PRE_A40LL_RF... Processing PRE_A40LL_AN... Processing PRE_D0UL_AN... Processing PRE_D20LL_RF... PRE_D20LL_AN Done!!! -- ---8<---Corte Aqui---8<--- |
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Re: Intermittent error
#hp8920b
Dear Peter,
I tried to clean all modules and all coax cables, but I wasn't successful, when HP8920B is on for 1 or 2 hours the failure is constant, but after 3 or 4 hours on, this failure becomes intermittent. Any help will be appreciated, Sorry for my bad English. Regards |
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Thank you, Alexander, for your email. Pls note that as I wrote in my previous, in the next step I will try with a sync separator. But I think that reporting this easy way to get a picture to the monitor, should prove a good
first step for many that otherwise might drop their efforts; and for others, including me, is a QnD solution when needed. 73 Yiannis SV1MNE ¦²¦Ó¦É? ¦°?¦Ì, 12 ¦¡¦Ô¦Ã 2021 ¦Ò¦Ó¦É? 6:57 ¦Ð.¦Ì., ¦Ï/¦Ç Alexandre Souza <alexandre.tabajara@...> ?¦Ã¦Ñ¦Á¦×¦Å: 08/08/2021 12:10, sv1mne wrote: |
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08/08/2021 12:10, sv1mne wrote:
Hi Alexander, it definitely works without a sync separator, via the Y Composite input (at least on my GBS8200)Ok, if you think that it is working missing a piece of the screen, feel free to use that way. -- |
Alexandre Souza
sv1mne