How do I set the digital time on my Pulsar 8010 it is currently running 1Hr behind the analogue. Whatever time i set it always goes back to 1 Hr behind.

If you cannot find the automatic way of setting the hands, you can manually reset the analogue hands by pressing the mode button until you reach the "HS" mode and using the 2 or 4 o'clock buttons to adjust the hands.

If you haven't got instructions on how to align the hands with the digital display , you can get instructions from the Casio web site.
Go to the casio web site "casio.com".
Select "support" and the "manuals",
watches;
Accept terms
Select "watch manual archive"
Read the number of the back of your watch and enter it into the search box

Use this link: http://www.citizenwatch.com/COA/English/settings.asp Fill in requested details of your watch and click on GET SETTING INSTRUCTIONS, then click on INTERACTIVE SETTING INSTRUCTIONS. There you will find everything you need to set up your watch.
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I answered this for different Fossil watch post, but I believe it will be the same for your watch.
I'll re-post the answer below.
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To set the alarm on these models of Pulsar watches, do the following:
Looking at the face of the watch, there are two buttons and a crown on the right side. The TOP button is Button "A". - The BOTTOM button is Button "B".
There are 3 positions on the crown: IN (#0), FIRST CLICK (#1) & SECOND CLICK (#2). 
The small dials located at the bottom of the watch face (6 O'clock) are the alarm minute and hour dials.

First, pull the crown out to the second 'click' (position #2) ... This is all the way out. (STOP THERE! Pulling harder will harm your watch! Don't try to pull past position #2!)
Second, set the correct time. (plus one or two minutes... time to complete this.)
Third, with the crown still out to position #2, push button "B" (bottom) until the alarm minute and hour hands are set to the present time (same as the large dials).
Fourth, push the crown all the way in- to position #0.
The current time on the large dial should read the same as the small alarm 'time'. {This is the CURRENT TIME, not the alarm SOUND SET.}
To set the alarm SOUND time, pull the crown out to the first click (position #1).
Push button "B" until the dials of the alarm are at the time you want the alarm to sound... It can only be set within 12 hours! ... It does NOT know "am or pm".
When the desired time is set for the "alarm sound", push the crown all the way in (position #0).
The alarm dials will now indicate the time for your alarm to sound, NOT the current time. (this way, you know that the alarm is engaged.)
To reset the alarm- or disable it, pull the crown out to the first click (position #1) and hold button "B" down until the dials advance and stop at the current time... it will stop at the current time- then release button "B". --- Push the crown back in (position #0) and the alarm will now be disabled.

If the alarm dials are always moving and at the current time, you know that the alarm is disabled.
If the alarm dials are stationary and not moving with the time, you know that the alarm is engaged and set to the time shown.

I hope this helps.

Actually, the watch has 3 buttons -- "Light" being the 3rd one. Press Mode until a number in the time mode begins flashing. Then press the Light button to get it to the hour indicator. Use the 12-24 Hr button to set it to the current hour. Then press the Light button again to get it to the minutes section. Again, use the 12-24 Hr. Button to set it to the next minute coming up in the current time. Then push the Light button again. This will bring up the seconds indicator. At the precise time the minute you set before begins, hit the 12-24 Hr. button, and the indicator goes back to zero and begins ticing away. Then hit the Mode button again until the watch is in the current time mode. Hope this helps. I use Internet time to set a precise time.

Replaced the Battery.

It is possible to set the main analogue hour and minute hand 30 minutes out of phase with the digital readout, but doing so will also put the analogue UTC dial 30 minutes off. It can be done by using a variation of the proceedure for zeroing the watch hands as follows: 1. Rotate the crown in its normal opering position to set the watch in chronograph mode (mode dial pointing to "chr") 2. Pull out the crown to the second click. This should cause all the hands on the watch to return to zero. "HR" should appear on the left-hand digital display. This will allow you to move the hour hand by twisting the crown. Advance it to about half way between the 12 o'clock and 1 o'clock positions. 3. Press the top button. "MIN" should appear in the left-hand digital display. This allows you to adjust the minute hand. Twist the crown to advance it to the 6 o'clock, or 30 minute, position. Note that this will also move the minute hand on the small UTC dial to the 30 minute position. 4. Press the crown back into its normal position. 5. Reset the digital time and date according to a time zone that is in a one-hour offset from UTC. This is not a perfect solution. Your digital readings will show the correct time for all one-hour offset time zones while your analogue nads are 30 minutes out of phase. Your small UTC dial will also be 30 minutes out of phase with the digital UTC. Hope this helps.

Here is a link to the manual: http://ftp.casio.co.jp/pub/world_manual/wat/en/qw1310.pdf It says: Hold do the (A) button [the upper-right button] to advance the analog time setting. The analog time will adjust forward at high speed. It only goes forward, so if you miss the proper time, you have to go all the way around again.

This problem may be due to your analog hands being improperly zeroed. To find out, try this: 1. Put the watch in chronograph mode by rotating the crowon in its normal position to "chr" 2. Pull out the crown two clicks. This should cause all of the hands to point to zero. If you do this and your minute hand points to 1 o'clock, or five minutes, you will know that this is the problem. If this is the problem, you can can correct it by zeroing the hands as follows: 1. Put the watch in chronograph mode by rotating the crowon in its normal position to "chr" 2. Pull out the crown two clicks. This should cause all of the hands to point to zero, or close to it. You should also notice the letters "HR" in the lefthand digital display. This allows you to move the hour hand by rotating the crown. If the hour hand is not pointing at 12 o'clock, rotate it so that it does. 3. Push the top button once. The letters "MIN" should appear in the lefthand digital display. This allows you to move the minute hand on the large dial, and the minute and hour hands on the small UTC dial. Rotate the crown so that the minute hand points directly to 12 o'clock. 4. Push the top button again. The letters "SEC" should appear in the lefthand digital display. Rotate the crown to point the second hand directly at 12 o'clock. 5. Push the crown back into its normal position. Set the digiatl time and date in your tie zone, and your analog hands should match the digital read-out. If the zeroing of the hands is not the problem, I don't know what is wrong with the watch.