Question about Celestron NexStar 130 SLT (306 x 130mm) Telescope

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I purchased a Nexstar RS-232 (93920) serial connector. Can I use any type of USB to DB9 serial adaptor with this connector for my MacBook Pro? Any recommended brands I can order online? Thank you, Kenneth

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Some work and some do not. The Keyspan brand is a good one, along with the one sold by

www.scopestuff.com

Here:
http://scopestuff.com/ss_usbr.htm

Posted on Dec 30, 2010

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Options for Adding Serial Ports The serial port is prevalent on PC's ...


Options for Adding Serial Ports
The serial port is prevalent on PC's as well as scores of industrial, scientific and consumer devices, making it a convenient starting point for communications. Since RS-232 itself is only suited to short connections (50 ft. max.) many applications require that it be adapted to fit requirements. RS-422, typically used for extending RS-232 communications, provides full duplex communications between two devices. It can also provide one way communications from one master to several slaves. RS-485 communications standard allows cable lengths up to 4000 feet. It also provides very high noise immunity. Multidrop connections up to 32 different nodes can be made over a single twisted pair cable along with a signal ground connection.
This article summarizes the choices a system designer has when adding a serial (RS-232, RS-422, or RS-485) communications device. There are many different ways to add additional serial ports to your Desktop PC, Palm, or Laptop PC. USB, PCMCIA, PCI and ISA are some of the methods that will be discussed.
The Universal Serial Bus (USB) provides a high data rate and Hot Swap connection for PCs, providing an easy connection to a wide variety of multimedia and network USB devices. Generally considered to be for home or office use, USB is finding its way into Industrial applications.
PCMCIA Serial Ports are yet another way to add serial ports to a PC that has PCMCIA Slots available. Most Laptops today offer only one (if any at all) DB9 type serial ports. A PCMCIA Serial Card is a good way to add a serial port (or ports) to any laptop that is low on available serial ports (RS-232, RS-422 or RS-485).
PCI Cards are becoming more popular as a way to add serial ports to desktop PC's. PCI type slots are becoming the "norm" in standard PC's today, and PCI Serial Cards are an excellent way to add serial ports. The standard Desktop PC may only come with one serial port standard (if any serial ports at all). PCI Serial Cards use Software Drivers to address the ports to the PC.
ISA Cards are yet another way to add serial ports to the older desktop PC's. ISA type slots are becoming scarce in standard PC's today, but are still an excellent way to add serial ports. The ISA Cards are typically addressed using dip switches and shunts or jumpers to set IRQ's for each port. No Software Drivers are required with ISA style serial cards.
Palm OS PDA's may be connected to RS-422 or RS-485 data circuits using Palm adapters. These adapters offer total portability for collecting data and field service chores. The Palm device and the adapter will usually slip into a shirt pocket. Some models use the PDA's connecting cable, some include a cable and some are cradles that allow the PDA to nest in place and connect directly to the Palm base socket. PalmTerm Freeware allows you to transmit and receive data from the Palm serial port.

on Sep 12, 2010 | Computers & Internet

1 Answer

How do i upload test results from my lt8600t tester to my PC. I have USB ports in my PC no serial port. What do i need?


Ah, yes, I too used Waveteks back in the old days and I still have old PCs with serial cards in them which typically came with the PC. They were never really all that expensive to replace.
Anyway, newer PCs typically lack serial (DB9) ports/cards; and simply using a USB-to-DB9 adapter on a device designed to use a DB9 interface won't help the PC "find" the unit attached to it. Theres no easy "plug-and-play" there. The PC wants to have drivers for the unit installed manually, then with some luck something will show up in Device Manager. Conversely the old Wavetek wants to see X number of pins, etc. or it will assume somethings wrong.

There are a few "USB to RS-232 DB9 Serial Drivers" (e.g. "Prolific" brand) to be downloaded here and there, I can't tell how effective they are, depending on your PC hardware/software.

Feb 16, 2015 | Wavetek Acterna LT 8600T Network Testing...

1 Answer

Driver needed


I found my disc. Problem solved. Thanks for follow-up.

Jan 11, 2009 | Sabrent USB to Serial (9-pin) DB-9 RS-232...

1 Answer

Need serial adaptor/cable


Welcome to FixYa! There are DB9 to usb adaptors at any electronics store like Radio Shack or Fry's. Also there are serial connectors that connect internally to motherboards having a COM port connection if this is a desktop/tower computer. Though he likes the camera he might like the fact that newer cameras have a much higher resolution than previously available for much less than he may have paid for the present one.
If you have any further questions feel free to post them here and include the brand/model of the new computer. Steve Medley

Jan 02, 2009 | Olympus D-460 Zoom Digital Camera

1 Answer

Meaning of Db and the use of Db9-male Cabl


The D is the shape of the connector when looked at it on it's side. The second letter (A,B,C,D,E) defines the amount of pins in the D connector. "DB9" is actually called DE by the standard and the E=9 pins. A=15, B=25, C=37, D=50, E=9. This standard was set in place by ITT Corp (Not the school) in 1952, and DE-9 connectors were used for tons of applications. (Machinery, Cars, etc). If you are only referring to the computer uses, the connector is widely known as RS-232 or a "Serial" port. These ports in computers were/are used for devices like early printers, scanners, networking hardware, or even as a method of connecting to the Internet at one point.

Dec 05, 2008 | Parallel 6 Foot DB9 Male - DB9 Female Null...

1 Answer

EPSON PHOTO PC 500 DIGITAL CAMERA


Serial meaning 2.5mm stereo headphone looking jack to DB9 or "atari joystick" looking plug? I had one on my first Toshiba PDR-M1 camera but that was like 9 years ago. You can probably find the pinouts online for that cable, I believe it is a standardized cable.

The stereo plug is wired to the PC serial port as shown in the following diagram:
tip ring sleeve +---------------------------------+
| |
/-------+-----+--------------+ |
| RxD | Gnd | TxD | 2.5 mm Stero Plug |
\-------+-----+--------------+ |
| |
DB9*: pin 2 pin 5 pin 3 +---------------------------------+

DB9*: Optionally short together pin 4 (DTR) to pin 6 (DSR) and
pin 7 (RTS) to pin 8 (CTS)
The following table also describes the camera cable's wiring: Camera PC's
Plug DB9* Signal Name Direction
---- ---- ----------- ---------
- 1 Carrier detect (CD) input to PC
tip 2 Receive data (RxD) input to PC
sleeve 3 Transmit data (TxD) output from PC
- 4 \ Data terminal ready (DTR) output from PC
ring 5 | Signal ground (Gnd) -
- 6 / Data set ready (DSR) input to PC
- 7 \ Request to send (RTS) output from PC
- 8 / Clear to send (CTS) input to PC
- 9 Ring indicator (RI) input to PC
* Note that the cable's D-subminature DB9 RS-232 serial port connector is female. This connector also goes by the historically more correct name of "DE-9J".

Feb 22, 2008 | Epson PhotoPC 500 Digital Camera

1 Answer

Symbol LS2208 barcode reader no data to screen


Just because it has a DB9 does not mean it is a direct connection. Many Bar code scanners have the DB9 connecting to a interface box and the interface box connects to the PC. If it is really a rs-232 scanner then you need to configure your serial port to the proper settings specified by symbol. But I am confident that this unit is missing the interface box.

Jun 27, 2007 | Symbol LS2208-7AZK0100S Handheld

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