HP 3586A, B, C guide

center of its filter’s band pass like in the other modes if the [CARRIER] button under the frequency display has its light on. Its performance should be similar to the low distortion but it selects the instrument’s widest filter.

Its important to realize when using this mode that the instrument’s tracking oscillator’s output signal is always at the RF frequency of the center of the instrument’s filter band pass and offset from the display frequency. I haven’t found a use for the tone frequency display feature, activated by the [TONE] button for RF work. It’s designed for tuning on a tone in the band pass of a SSB channel on telephone lines.

Both [CARRIER] and [TONE] buttons do not affect tuning when the instrument is out of the SSB channel measuring modes, even when their button lights are on. When the instrument is in the either of the selective modes and the CENTER frequency annunciator is on the display frequency is always the filter’s center RF frequency. For level measurements of very weak SSB signals, try the low noise selective mode and look for signs of intermodulation, i.e. increased signal strength readings before recording any level measurements.

With the A and B versions this mode automatically selects the wide band pass filter. Signal level measurement errors can be introduced because of a WTD audio filter is also switched in which reduces audio levels below 400Hz and above 2000Hz. You may want to use the widest filter without the WDT noise filter if you have the 003 filter option in your instrument.

16.6Wideband - Use only for broadband non-selective measurements like in our audio amplifier example. The frequency tuning and tracking oscillator features are disabled in this mode since they are not needed. It could be used for selective measurements of single signals in devices or electronic circuits, but its use will result in a much higher instrument noise floor of around –70dbm compared to –117dbm to – 120dbm in the other modes.

16.7Impulse Noise – Can be used for measuring the number of pre set level peaks over a preset time interval. This mode is not available on the C version. This mode is useful for measuring shot or impulse noise from amplifiers as shown in a Chapter 12. It also could be used for capturing peak power on widely varying signals like from SSB voice signals but for accurate measurements this may be difficult and very inaccurate when a SSB radio signal is subjected to fading.

16.8Enhanced Frequency Accuracy – For one year after its calibration the HP3586 has excellent frequency accuracy. To further improve frequency accuracy HP sold the 004 option, which added an internal board with a 10MHz crystal in a temperature controlled oven for much higher accuracy and easier frequency calibration. Some surplus instruments have this option installed or the 004 board A16 module may be occasionally found on the used market. My instrument had this option installed but if yours

doesn’t, I think a 10MHz standard could easily be built. Obtain an accurate 10MHz crystal from one of the common sources, California Crystal Labs or International Crystal, and build a solid state oscillator circuit in a small RF sealed box capable of outputting at least–10dbm, 1/10 miliwatt, at 10MHz. Mount it to the back of your HP3586 and connect its output to the EXT REF connector on the back on the HP3586. Provide a small padder cap in parallel with the crystal and a cap in series with the crystal so it will tune about +/- 200Hz around 10MHz for calibration. Then just calibrate the oscillator and instrument’s frequency by simply tuning to the RF signal of one of the WWV stations at 5, 10 or 15MHZ. Adjust the LED display frequency to the frequency of one of these stations and then place the instrument into the frequency counter mode. To calibrate it adjust the trimmer in parallel with the oscillator’s crystal for a display reading of all zero’s in the frequency display’s least significant digits. Even though the crystal isn’t in an oven, your instrument should stay calibrated within 10Hz when operating at room temperature between 50F and 80F for years just like the BFO crystals in a SSB receiver.

B, 3586A, C specifications

The HP C3586A and C3586B tape drives are notable components in the realm of data storage solutions, primarily designed for enterprise-class environments. These SCSI (Small Computer System Interface) tape drives are regarded for their efficiency, reliability, and capacity to meet the growing demands of data backup and archival processes in businesses.

The C3586A model utilizes the DAT (Digital Audio Tape) technology, which allows it to deliver high performance and high data density. It features a native capacity of 2.3 GB per cartridge, which can be extended to 4.6 GB with the use of compression. This is particularly advantageous for businesses requiring significant amounts of data storage without the necessity for multiple tapes. The transfer rate is rated at up to 12 MB per minute, which ensures quick backups and restores, minimizing the operational downtime.

In terms of data integrity and security, both models incorporate advanced error correction techniques to guarantee that data remains pristine and intact throughout the storage duration. They are designed to work seamlessly with a variety of operating systems and backup applications, enhancing compatibility and user convenience.

The HP C3586B, on the other hand, offers similar foundational technologies but with enhanced features. It supports higher capacity tapes and is engineered to work seamlessly in high-performance environments. With the integration of SCSI-2 interfacing, users can expect faster data transfer rates, which is critical for organizations dealing with large volumes of data.

Another key aspect of both models is their rugged design, which provides durability and reliability needed for long-term storage solutions. The drives are built to withstand extended usage, which makes them a cost-effective choice for businesses looking to invest in dependable data storage systems.

Furthermore, these drives come with a user-friendly interface and straightforward maintenance. This allows IT personnel to handle backups with ease while keeping the workflow uninterrupted.

In summary, the HP C3586A and C3586B tape drives epitomize the union of technology, usability, and dependability. Their robust features, including high data capacity, fast transfer rates, and durable construction, make them a formidable choice for enterprises seeking efficient data backup and archival solutions in the ever-evolving digital landscape.