3 General OSCILLOSCOPE INSTRUCTION MANUAL DESCRIPTION The model PS-XX0/XX1/XX5 oscilloscope is a dual-channel oscilloscope with frequency bandwidth 20~100 MHz at -3dB; maximum sweep 10 nS/DIV; maximum. I Need a JDR Instruments Model 2000 Oscilloscope Service Manual. Electronics Forums. SERVICE MANUAL for Hung Chang Oscilloscope model OS-615S.
ProTek CRO - Model 6502 Covers 20, 40 and 60Mhz. ProTek brand is also known as Hung Chang - Service Manual Free Download Schematics 4 Free Service manuals, schematics, documentation, programs, electronics, hobby. (welcome to eserviceinfo.com at 17 Aug 11:33 pm GMT) [news] [/news] Login: Password: Now downloading free:ProTek 6502 ProTek 6502 Oscilloscopes, digital oscilloscopes, Tektronix oscilloscopes, cathode ray ocilloscopes, pc oscilloscopes service manuals and repair information File information: File name: ProTek_CRO_6502_All_Manuals_part1.rar Size: 2929 kB Extension:.rar MD5 Checksum: 0d65f554f8b35221e9fea2 Mfg: ProTek Model: 6502 Original no||Chassis||Ordercode: Description: ProTek CRO - Model 6502 Covers 20, 40 and 60Mhz.
Contents • • • • Hardware • QuickLogic QL2003 pASIC 2 non-volatile FPGA • Analog Devices ADSP-2105 microcontroller at 12.5MHz • 2x ISSI IS61C256AH-10J 32kB SRAM • 2x Harris (Intersil) HI5714/6CB ADC The hardware does not allow to sample both channels at the same time as the ADCs are always connected to the same signal. There are a lot of making accurate measurements with this device nearly impossible. The FPGA handles the low level parallel port protocol so that the microcontroller can interact with the PC using a single byte mailbox in its address space. Samples from SRAM or the ADCs are passed on to the PC by the FPGA without the microcontroller being involved. It also generates the phase shifted sampling clocks from the 50MHz oscillator and increments the SRAM address to take 10240 samples when it detects the correct edge on its trigger input. There is no way to take more samples than that on an event. Most of the 64kB SRAM stays unused.
While the microcontroller is sold as a DSP, its purpose in this device is to handle the state machine that receives the configuration parameters from the PC and to put the FPGA into the requested state. It is also used to copy samples between different regions of the SRAM. Its firmware is ~1000 instructions and can be disassembled using. It shows that there are indeed no more commands than those listed on the page linked below.
In 2012 it was still possible to request the schematics from as it was sold there with the product number 129208 back in 1999. They will send it on an A3 sheet by snail mail. The schematics are of bad quality with barely readable numbers, missing values, missing or wrong units (i.e. 12KF resistors), and blatant errors (op-amps with positive and negative input connected). It also doesn't tell you that some parts have not been populated. The AX1027 resistor array is (P1) - 70Ω - (P2) - 150Ω - (P3) - 75Ω - (P4) - 45Ω - (P5) - 30Ω - (P6).
Protek by HUNG CHANG 6502 REAL TIME OSCILLOSCOPE FEATURE: Small, light weight portable 20MHz oscilloscope High sensitivity (1mV/div) and 2 channel, dual trace 6 inch internal grid MAG, simultaneous sweep waveform: x 1 and x10 (x5) ALT TRIG: synchronization between two different signals TV Sync.: stable TV signal observation AUTO Focus: Auto-correction of focus diversion CAL voltage: 0.5V, sine wave, 1kHz Operation voltage: AC110V, 120V, 220V, 240V ±10% 50/60Hz Dimension: 335 (W) x 140 (H) x 375 (D) mm Weight: 7.3 kg. Accessories: power cord, Fuse, probe, manual Specifications Real time oscilloscope 20MHz.